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

No annotations are provided, so the description carries full responsibility. It discloses key behaviors: NTP-verified timestamp falls back to local clock when unreachable, the record indicates which was used, and a SHA256 is computed over the canonical record. This is transparent and informative.

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 concise and front-loaded with the core purpose. It repeats 'tamper-evident' twice, which is slightly redundant, but overall it is efficient and well-structured.

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 simple tool with two parameters, the description covers the essential purpose and behavior. It does not describe the output structure, but that is not required given the simplicity and the absence of an output schema. It is sufficiently complete for an agent to invoke 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?

The schema only provides names and basic descriptions. The tool description adds meaning by explaining 'payload' as 'any JSON value to attest' and 'server' as 'NTP server for the verified timestamp', clarifying their roles beyond the schema's minimal info.

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's function: wrapping a payload into a tamper-evident record with UUID, timestamp, and SHA256. It is specific and distinguishes from sibling tools like verify or generate_uuid by focusing on creation of the full record.

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 (call to create an attestation) but does not explicitly state when to use this tool versus alternatives (e.g., verify). It lacks explicit 'when to use' or 'when not to use' guidance, so it's adequate but not thorough.

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