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

No annotations are provided, so the description carries the full burden. It discloses the cost (0.003 USDC), which is genuinely useful behavioral context, but says nothing about what binding does, whether the record is immutable, what authentication or key material is required, or side effects.

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 terse clause with the core subject and price front-loaded; nothing is padded. It is arguably too sparse for the tool's complexity, but as raw conciseness it is efficient.

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 an attestation/evidence tool sitting among many near-identical siblings, with no annotations, the description leaves the agent unable to tell what evidence is produced or when to invoke it. The existing output schema removes the need to explain return values, but the invocation context is still under-specified.

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% and the example fully documents the nested identity fields, so the schema does the heavy lifting. The description's list of domain/endpoint/manifest/key/version mirrors the schema fields without adding format or validation detail, matching the baseline 3 for high-coverage schemas.

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?

Names a verb ('Bind') and the resources involved (domain, endpoint, manifest, key, version), so the subject matter is identifiable. However, 'Bind' is ambiguous about what artifact is produced – it does not say this creates an identity/attestation evidence record – and it does not distinguish itself from siblings like domain_ownership_evidence, oauth_issuer_binding_evidence, or manifest_version_diff.

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?

There is no when-to-use guidance, no prerequisites, and no mention of alternatives despite a crowded sibling set of evidence/guard tools. The only extra information is the price, which does not help an agent decide between this and domain_ownership_evidence.

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