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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so the safety profile is covered. The description adds genuinely new context: the payload is methodology/limits/source links/worked examples, it contains 'no user records', and the caller is instructed to cite the canonical URL. It does not discuss failures or rate limits, but for a read-only lookup that is minor.

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 compact sentences, front-loaded with the retrieval action and immediately followed by payload scope. No filler, though the final imperative ('Cite the returned canonical URL') sits slightly awkwardly inside a retrieval description.

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?

Rich annotations plus an output schema mean the definition does not need to describe return shape; it still adds source-of-truth guidance (ID from search) and the citation obligation. For a one-parameter, read-only tool this is close to sufficient, with only the opaque enum value left unaddressed.

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% and the sole enum value ('permit') is unexplained, so the description must carry the load. It does add meaning by stating the id comes from search results, but it never explains what a valid id looks like or that the enum currently admits only one value.

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?

States a specific verb+resource ('Retrieve a public tool reference') and distinguishes it from the search sibling by specifying the input is 'the ID returned from search'. A reader can tell this is the follow-up lookup step rather than the discovery step, though the title's 'Web3 method' framing is never echoed in the body.

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 phrase 'by the ID returned from search' implies the prerequisite call sequence, which is real usage guidance. However, there is no explicit when-not, no mention of check_data_permissions, and no statement of what happens if the ID is invalid or absent.

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