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

No annotations are provided, so the description carries full burden. It discloses the primary behavior (fetch and verify) but omits key details such as what is returned (e.g., the receipt object, a boolean, or an error), what happens when the signature is invalid, and whether the operation is read-only. This is a significant gap for a tool that performs a cryptographic check.

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 sentence that is front-loaded with the verb and resource. No wasted words, and it conveys the essential action clearly.

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 there is no output schema, the description should explain what the tool returns or how the verification result is presented. It does not, leaving an agent uncertain about how to interpret the outcome. For a tool that checks a signature, knowing whether it returns a boolean, a receipt with a verification status, or throws an error is essential. This gap makes the description incomplete for correct invocation and result handling.

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 provides 100% coverage for the single parameter, including an example format. The description adds no additional semantics beyond what the schema already states, so the baseline of 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 states a specific verb ('Fetch') and a clear resource ('verification proof receipt') plus the action ('check its cryptographic Ed25519 signature'). This clearly differentiates it from sibling tools like agora_get_stats or agora_post_problem, which deal with different resources.

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: you call this when you have a receipt_id and need to verify it. However, there is no explicit statement of when to use it versus alternatives, and no mention of prerequisites or when not to use it. Since no sibling tool overlaps with receipts, the lack of explicit routing is acceptable but still not stated.

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