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

Annotations already declare readOnlyHint=true, idempotentHint=true, openWorldHint=false and destructiveHint=false, so the safety profile is fully covered. The description adds only that it returns a single record, saying nothing about how it behaves on an invalid or unresolvable URL, or whether the URL must match an existing record. With annotations carrying the load, a 3 is appropriate.

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 short sentences with the core action front-loaded and no filler. The second sentence is slightly opaque ('ChatGPT Company Knowledge citations'), but it does carry the usage hint rather than padding.

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?

Low-complexity read tool with a single documented parameter, an output schema that covers the return value, and annotations covering safety. The main remaining gap — which record types are resolvable and what happens on failure — is modest given the tool's simplicity.

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?

There is one parameter with 100% schema coverage; the schema already explains that the URL comes from the search tool or a browser-copied Relaticle URL. The description's phrase 'canonical URL' merely echoes it and adds no new meaning, 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?

States a specific verb and resource: 'Fetch a single CRM record by its canonical URL.' This is clear, but it does not distinguish itself from the typed getters in the sibling list (get-company-tool, get-people-tool, get-note-tool). An agent cannot tell from the description whether this is a generic shortcut across entity types or something else entirely.

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?

'Pair with the search tool for ChatGPT Company Knowledge citations' implies the workflow — search first, then fetch — but it never says when to choose this over the per-entity get-*-tool siblings. Usage is implied rather than stated, and there are no exclusions.

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