verify_evidence_chain

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

No annotations are supplied, so the description carries the full burden. It implies a read-only verification and names the storage backends, but says nothing about what a match versus a mismatch produces, whether a missing object errors out, or whether any credentials/ACLs are required for the B2/R2 bucket.

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?

A single front-loaded sentence with no filler or repetition. It is appropriately sized, though the same sentence length could have been spent on outcome semantics instead of enumerating document types.

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 verification tool with no annotations and no output schema, the description omits exactly what an agent needs: the shape of the verification result and the failure modes. It is complete enough to identify the action but not enough to interpret its outcome.

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%, so the baseline is 3. The description reinforces the meaning by tying storage_uri to the B2/R2 backends and expected_sha256 to the cryptographic check, but it adds no format, encoding, or case-sensitivity details beyond the schema.

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 states a specific verb and object: verify the SHA-256 cryptographic proof chain of a CPS/RC/PV extract stored on Backblaze B2 or Cloudflare R2. It is far more specific than a restatement of the name, but it never contrasts itself with adjacent siblings such as get_execution_audit_trail or audit_submission_checklist, which an agent could plausibly confuse with an integrity check.

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?

No when-to-use or when-not-to-use guidance is given, and no alternative tool is named. The agent must infer from the name alone that this is an integrity pre-check on a stored artefact rather than an audit or checklist operation.

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