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c2pa-mcp

c2pa-mcp

by harelrech
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
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Verify C2PA content credentials at a URL

verify_c2pa_url

Download a remote image, video, audio, or PDF over HTTPS and verify its C2PA Content Credentials. Returns a plain-language verdict on trust, AI generation, and provenance.

Instructions

Download a remote image, video, audio, or PDF over https and verify its C2PA Content Credentials. Returns the same plain-language verdict, signer, AI-generation status, lineage, and issues as verify_c2pa_file. Use this for a web URL. Only public https URLs are allowed (private/internal hosts are refused).

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": {
      "url": "<url>"
    },
    "name": "verify_c2pa_url"
  }
}

Input Schema

NameRequiredDescriptionDefault
urlYesPublic https URL of 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

A4/5.0
Behavior3/5

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

With no annotations, the description carries the burden. It discloses network access (downloading) and URL restrictions. It mentions output equivalence with verify_c2pa_file, giving insight into return format. However, it lacks details on failure modes, size limits, or performance characteristics, leaving some gaps.

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?

The description is three concise sentences, each serving a purpose: action, output, usage direction, and constraint. No wasted words, and the most important info is front-loaded.

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?

Given two parameters, no output schema, and no annotations, the description covers the main behavioral points (network access, URL constraint, output similarity). It is sufficient for a tool that parallels an existing one. Minor omission: no mention of error handling or default for includeRaw (though schema covers it).

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 baseline is 3. The description adds context by linking includeRaw to the sibling's behavior, but does not elaborate beyond what the schema provides. Adequate but not enhanced.

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 downloads a remote file over https and verifies C2PA credentials. It lists supported media types and explicitly distinguishes from sibling verify_c2pa_file by saying 'Use this for a web URL.' The title and description align well.

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?

The description provides explicit guidance: 'Use this for a web URL' and notes that only public https URLs are allowed, with private/internal hosts refused. This helps the agent decide when to use this tool. However, it does not directly mention alternatives like c2pa_info or scan_c2pa_directory, but the sibling context is available.

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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