MCP MeasureMCP Measure

index observed

Darwin-owned Files

Free offline PDF, XLSX, CSV, ZIP and iCalendar tools. Supplied data; real embedded file bytes.

Should I use this

Quality & Safety

B
Description quality
100%
Schema completeness
80%
Naming quality
80%
Poisoning risk
0%
Permission match
100%
Protocol compliance
100%

Findings (6)

  • HIGHTool poisoning patterns detected
  • MEDIUMTool description contains URL to non-standard domainin markdown_to_pdf
  • MEDIUMTool description contains URL to non-standard domainin csv_to_xlsx
  • MEDIUMTool description contains URL to non-standard domainin xlsx_to_csv
  • MEDIUMTool description contains URL to non-standard domainin zip_text_files
  • MEDIUMTool description contains URL to non-standard domainin event_brief_to_ics

Based on automated analysis of tool definitions and protocol compliance.

Context Cost

~1,812Tokens (tool definitions)
~2.8 KBTypical response size
Moderate attention impact (1.42% of 128k context)

This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.

Install

One-Click Install

Add this to your `claude_desktop_config.json` file:

{
  "mcpServers": {
    "owned-file-mcp": {
      "url": "https://creora.darwin.so/providers/files/mcp"
    }
  }
}

Remote endpoints

https://creora.darwin.so/providers/files/mcpstreamable-http

What it can do

Tool inventory

Tools (5)

🟢 Read-only🟡 Write🔴 Delete⚪ Unknown
🟢markdown_to_pdf(markdown)

Render caller-supplied text Markdown to a real downloadable PDF. Headings, paragraphs and lists; Windows-1252 text only. No images, HTML, fetches or external writes. Returns actual inline file bytes and SHA256. Official documentation: https://creora.darwin.so/providers/files/docs

Input Schema

{
  "type": "object",
  "properties": {
    "markdown": {
      "type": "string",
      "minLength": 1,
      "maxLength": 131072
    }
  },
  "required": [
    "markdown"
  ],
  "additionalProperties": false
}

Output Schema

{
  "type": "object",
  "properties": {
    "artifacts": {
      "type": "array",
      "minItems": 1,
      "maxItems": 16,
      "items": {
        "type": "object",
        "properties": {
          "name": {
            "type": "string"
          },
          "mimeType": {
            "type": "string"
          },
          "sizeBytes": {
            "type": "integer",
            "minimum": 1,
            "maximum": 262144
          },
          "sha256": {
            "type": "string",
            "pattern": "^[a-f0-9]{64}$"
          },
          "base64": {
            "type": "string",
            "contentEncoding": "base64"
          }
        },
        "required": [
          "name",
          "mimeType",
          "sizeBytes",
          "sha256",
          "base64"
        ],
        "additionalProperties": false
      }
    },
    "sourceSha256": {
      "type": "array",
      "items": {
        "type": "string",
        "pattern": "^[a-f0-9]{64}$"
      }
    },
    "sheetNames": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "externalWrites": {
      "const": false
    }
  },
  "required": [
    "artifacts",
    "sourceSha256",
    "sheetNames",
    "externalWrites"
  ],
  "additionalProperties": false
}
🟢csv_to_xlsx(csv, numericColumns, totalColumns)

Convert exact caller CSV to a real XLSX spreadsheet with one Data sheet and a SUM totals row. Explicit numericColumns and totalColumns; all other cells are literal strings, never inferred formulas. Returns actual file bytes. Official documentation: https://creora.darwin.so/providers/files/docs

Input Schema

{
  "type": "object",
  "properties": {
    "csv": {
      "type": "string",
      "minLength": 1,
      "maxLength": 131072
    },
    "numericColumns": {
      "type": "array",
      "maxItems": 64,
      "uniqueItems": true,
      "items": {
        "type": "string"
      }
    },
    "totalColumns": {
      "type": "array",
      "minItems": 1,
      "maxItems": 64,
      "uniqueItems": true,
      "items": {
        "type": "string"
      }
    }
  },
  "required": [
    "csv",
    "numericColumns",
    "totalColumns"
  ],
  "additionalProperties": false
}

Output Schema

{
  "type": "object",
  "properties": {
    "artifacts": {
      "type": "array",
      "minItems": 1,
      "maxItems": 16,
      "items": {
        "type": "object",
        "properties": {
          "name": {
            "type": "string"
          },
          "mimeType": {
            "type": "string"
          },
          "sizeBytes": {
            "type": "integer",
            "minimum": 1,
            "maximum": 262144
          },
          "sha256": {
            "type": "string",
            "pattern": "^[a-f0-9]{64}$"
          },
          "base64": {
            "type": "string",
            "contentEncoding": "base64"
          }
        },
        "required": [
          "name",
          "mimeType",
          "sizeBytes",
          "sha256",
          "base64"
        ],
        "additionalProperties": false
      }
    },
    "sourceSha256": {
      "type": "array",
      "items": {
        "type": "string",
        "pattern": "^[a-f0-9]{64}$"
      }
    },
    "sheetNames": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "externalWrites": {
      "const": false
    }
  },
  "required": [
    "artifacts",
    "sourceSha256",
    "sheetNames",
    "externalWrites"
  ],
  "additionalProperties": false
}
🟢xlsx_to_csv(xlsxBase64)

Extract every sheet from a caller-supplied base64 XLSX into separate genuine UTF-8 CSV files, preserving sheet names in metadata and cell values. Formula values require existing caches; does not execute formulas. Refuses macros, external links and expansion bombs. Official documentation: https://creora.darwin.so/providers/files/docs

Input Schema

{
  "type": "object",
  "properties": {
    "xlsxBase64": {
      "type": "string",
      "minLength": 1,
      "maxLength": 174764
    }
  },
  "required": [
    "xlsxBase64"
  ],
  "additionalProperties": false
}

Output Schema

{
  "type": "object",
  "properties": {
    "artifacts": {
      "type": "array",
      "minItems": 1,
      "maxItems": 16,
      "items": {
        "type": "object",
        "properties": {
          "name": {
            "type": "string"
          },
          "mimeType": {
            "type": "string"
          },
          "sizeBytes": {
            "type": "integer",
            "minimum": 1,
            "maximum": 262144
          },
          "sha256": {
            "type": "string",
            "pattern": "^[a-f0-9]{64}$"
          },
          "base64": {
            "type": "string",
            "contentEncoding": "base64"
          }
        },
        "required": [
          "name",
          "mimeType",
          "sizeBytes",
          "sha256",
          "base64"
        ],
        "additionalProperties": false
      }
    },
    "sourceSha256": {
      "type": "array",
      "items": {
        "type": "string",
        "pattern": "^[a-f0-9]{64}$"
      }
    },
    "sheetNames": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "externalWrites": {
      "const": false
    }
  },
  "required": [
    "artifacts",
    "sourceSha256",
    "sheetNames",
    "externalWrites"
  ],
  "additionalProperties": false
}
🟢zip_text_files(files)

Create an exact ZIP of caller-supplied named UTF-8 texts. Preserves bytes and nested safe paths; rejects traversal, duplicate/colliding names and excessive data. No external files or fetches. Official documentation: https://creora.darwin.so/providers/files/docs

Input Schema

{
  "type": "object",
  "properties": {
    "files": {
      "type": "array",
      "minItems": 1,
      "maxItems": 32,
      "items": {
        "type": "object",
        "properties": {
          "name": {
            "type": "string",
            "minLength": 1,
            "maxLength": 160
          },
          "text": {
            "type": "string",
            "minLength": 1,
            "maxLength": 131072
          }
        },
        "required": [
          "name",
          "text"
        ],
        "additionalProperties": false
      }
    }
  },
  "required": [
    "files"
  ],
  "additionalProperties": false
}

Output Schema

{
  "type": "object",
  "properties": {
    "artifacts": {
      "type": "array",
      "minItems": 1,
      "maxItems": 16,
      "items": {
        "type": "object",
        "properties": {
          "name": {
            "type": "string"
          },
          "mimeType": {
            "type": "string"
          },
          "sizeBytes": {
            "type": "integer",
            "minimum": 1,
            "maximum": 262144
          },
          "sha256": {
            "type": "string",
            "pattern": "^[a-f0-9]{64}$"
          },
          "base64": {
            "type": "string",
            "contentEncoding": "base64"
          }
        },
        "required": [
          "name",
          "mimeType",
          "sizeBytes",
          "sha256",
          "base64"
        ],
        "additionalProperties": false
      }
    },
    "sourceSha256": {
      "type": "array",
      "items": {
        "type": "string",
        "pattern": "^[a-f0-9]{64}$"
      }
    },
    "sheetNames": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "externalWrites": {
      "const": false
    }
  },
  "required": [
    "artifacts",
    "sourceSha256",
    "sheetNames",
    "externalWrites"
  ],
  "additionalProperties": false
}
🟢event_brief_to_ics(eventBrief, createdAt)

Create a real iCalendar file from a brief with Start: YYYY-MM-DD HH:MM IANA/Zone, Duration: N minutes, Title: text, optionally preceded by a Markdown heading. Resolves timezone to UTC; refuses ambiguous/nonexistent DST times. createdAt must be UTC ISO seconds. Does not add any calendar event. Official documentation: https://creora.darwin.so/providers/files/docs

Input Schema

{
  "type": "object",
  "properties": {
    "eventBrief": {
      "type": "string",
      "minLength": 1,
      "maxLength": 131072
    },
    "createdAt": {
      "type": "string",
      "pattern": "^[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}Z$"
    }
  },
  "required": [
    "eventBrief",
    "createdAt"
  ],
  "additionalProperties": false
}

Output Schema

{
  "type": "object",
  "properties": {
    "artifacts": {
      "type": "array",
      "minItems": 1,
      "maxItems": 16,
      "items": {
        "type": "object",
        "properties": {
          "name": {
            "type": "string"
          },
          "mimeType": {
            "type": "string"
          },
          "sizeBytes": {
            "type": "integer",
            "minimum": 1,
            "maximum": 262144
          },
          "sha256": {
            "type": "string",
            "pattern": "^[a-f0-9]{64}$"
          },
          "base64": {
            "type": "string",
            "contentEncoding": "base64"
          }
        },
        "required": [
          "name",
          "mimeType",
          "sizeBytes",
          "sha256",
          "base64"
        ],
        "additionalProperties": false
      }
    },
    "sourceSha256": {
      "type": "array",
      "items": {
        "type": "string",
        "pattern": "^[a-f0-9]{64}$"
      }
    },
    "sheetNames": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "externalWrites": {
      "const": false
    }
  },
  "required": [
    "artifacts",
    "sourceSha256",
    "sheetNames",
    "externalWrites"
  ],
  "additionalProperties": false
}

Community

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Evidence

Recent observations

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