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

Annotations only cover readOnlyHint and openWorldHint, so the description carries most of the burden and does so well: it discloses that no key is needed, that nothing sent is stored, that verification can also run offline, and that failures report each named test plus the first breaking record. It does not describe error behavior for malformed input or payload size limits, which keeps it from a 5.

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?

Two dense sentences that front-load the verb and resource, then pack the checked properties and return shape without filler. The inline URLs are long but informative rather than redundant, and nothing could be cut without losing substance.

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?

With no output schema, the description correctly compensates by explaining the return value (valid/invalid, per-test naming, first breaking record). For a nested-object verification tool that is close to complete; the only missing piece is how the optional chain array should be populated when the agent has surrounding records.

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%, including the note that chain order is irrelevant because links are verified in seq order, so the schema already does the heavy lifting. The description adds only the conceptual framing that 'chain' means the surrounding records; it adds no format or size detail beyond the schema, so the baseline 3 applies.

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 names a specific verb (verify) and a specific artifact (SwapEazi Release Record v1), then enumerates exactly what is checked: schema, hash, chain link and Ed25519 signature, plus the valid/invalid return shape. The only gap is sibling differentiation: a near-identically named tool, swapeazi_verify_record, exists and the description never explains how this one differs.

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?

Usage is implied by 'the evidence of a managed payment' and by listing the source tools that produce records (record_release, release_status, GET /api/v1/releases/{id}), which helps an agent know where the input comes from. However, there is no explicit when-to-use vs the swapeazi_verify_record sibling, no guidance on when to supply the optional chain array versus a single record, and no stated exclusions.

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