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c2pa-mcp

c2pa-mcp

by harelrech
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Local

Verify C2PA content credentials in a local file

verify_c2pa_file

Verify the provenance and trust of local media files by checking their C2PA Content Credentials. Returns a plain-language verdict on trust, AI generation, and edit history.

Instructions

Verify the C2PA Content Credentials (provenance) of a local image, video, audio, or PDF file. Returns a plain-language verdict (trusted / valid_untrusted / invalid / no_credentials), the signer, whether the content is AI-generated, its edit history, provenance lineage, and any validation issues. Use this when you have a file path on disk. The file is read locally and never uploaded.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "path": "<path>"
    },
    "name": "verify_c2pa_file"
  }
}

Input Schema

NameRequiredDescriptionDefault
pathYesAbsolute or relative path (or file:// URI) to the media file to verify.
includeRawNoIf true, include the full raw C2PA manifest store in the structured result. Defaults to false.

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.3

TDQS

A4.2/5.0
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations provided, but the description discloses that the file is read locally and never uploaded, and enumerates the output fields (verdict, signer, AI-generated, etc.), which adds behavioral context beyond the schema.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two sentences, front-loaded with the tool's action and outputs, followed by usage guidance. No redundancy or unnecessary details.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a tool with two parameters and no output schema or annotations, the description provides a good overview of the return values and privacy aspect. Could elaborate on the format of edit history or lineage, but overall sufficient.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the parameters are already well-documented. The description adds usage context ('Use this when you have a file path') but does not significantly augment the schema's parameter explanations.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's function: verifying C2PA content credentials of local files. It lists outputs and differentiates from verify_c2pa_url by specifying local file path usage.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Provides explicit guidance to use when there is a file path on disk, and notes the file is read locally and never uploaded. Does not explicitly mention when not to use or list alternatives, but context is clear enough.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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