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

Annotations declare readOnlyHint=true, idempotentHint=false, destructiveHint=false, and openWorldHint=true. The description says 'pay one bounded KEVAREMESH gateway fee' and 'receive the withheld provider results', which implies a financial side effect and a state transition, yet readOnlyHint=true suggests no state change. This is a potential contradiction: paying a fee and finalizing a job is not read-only. The description does not clarify idempotency (idempotentHint=false) or whether re-reading with the same token is idempotent. It adds some context about re-reading without another charge, but the fee/payment language conflicts with the readOnlyHint annotation.

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 two sentences, front-loaded with the primary action and outcome, and the second sentence adds a useful re-read nuance. It is concise and structured, though the phrase 'KEVAREMESH' is repeated multiple times, which is slightly redundant but not harmful.

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?

Given the tool has no output schema and only 2 parameters, the description covers the main flow: finalize after upstream success, pay fee, receive results, and re-read without charge. However, it does not explain what happens if upstream executions have not succeeded, what 'bounded fee' means in practice, or what the response contains. The readOnlyHint contradiction also leaves the agent uncertain about side effects. It is adequate but has clear gaps.

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 0%, so the description must compensate. It mentions 'finalize token' and 'gateway_request_id' implicitly: 'valid finalize token' and 'gateway_request_id' are not explicitly described, but the description references the token and the job context. It does not explain the format or relationship between the two parameters beyond what the schema provides (uuid, minLength 20). Baseline 3 is appropriate because the description adds minimal semantic value over 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 ('finalize') and resource ('KEVAREMESH gateway'), and explains the action: pay a bounded fee and receive withheld provider results. It distinguishes itself from siblings by mentioning 'after all prepared upstream executions succeed' and 'already-settled jobs can be read again', which implies a finalization/read step distinct from execute/quote/route. However, it does not explicitly name a sibling alternative, so it is clear but not fully differentiated.

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 gives clear context: use after all prepared upstream executions succeed, and it notes that already-settled jobs can be read again with the valid finalize token without another charge. This implies when to use it and provides a re-read use case. It does not explicitly state when not to use it or name alternatives, but the context is strong enough for an agent to infer the appropriate timing.

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