git_commit_pgp_signature_verifier

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

With no annotations, the description carries the full burden. It discloses a payment requirement ('0.030 USDC on Base L2') and the purpose of preventing supply-chain attacks, but it does not describe output format, failure behavior, or authentication needs. The mention of 'x402 settlement' in the parameter schema partially covers payment context, but overall behavioral disclosure is incomplete.

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

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

The description is a single sentence that front-loads the core purpose ('Verifies...') and then appends the cost in parentheses. It is concise with no waste, and the main function is immediately clear.

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

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

For a tool involving payment and signature verification, the description lacks essential details such as output format (e.g., boolean, details object) and whether payment is mandatory given that 'paymentSignature' is optional in the schema. The absence of an output schema means the description should clarify what the agent can expect as a result, but it does not. This leaves gaps for an agent to call the tool correctly.

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

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

Schema description coverage is 100% for both parameters, so the baseline is 3. The description adds no extra meaning beyond the schema; it does not elaborate on the payload structure or payment signature details. The schema already describes 'payload' generically and 'paymentSignature' as a Base L2 USDC signature, so the description provides no additional semantic value.

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

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

The description clearly states the tool verifies OpenPGP and SSH cryptographic signatures on Git commits and tags, which is a specific verb and resource. It further specifies the context of verifying against maintainer keyrings to prevent supply-chain attacks, distinguishing it from other signature verifiers like verify_evm_signature or verify_signature_eip191 that target different formats.

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

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

The description implies usage for Git commit/tag signature verification but does not explicitly mention alternatives or when not to use it. There is no guidance on selecting this tool over sibling verifiers, though the specificity of 'Git commits and tags' provides implicit context. No exclusions or alternative tool references are given.

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