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

The readOnlyHint annotation already establishes this as a non-mutating read, so the description doesn't need to carry the safety profile. It adds a small amount of context — "with all its fields" signals a full record rather than a projection — and cites the underlying endpoint, but says nothing about not-found behavior or error cases.

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 zero waste; the purpose statement is front-loaded and the endpoint citation is a compact, useful appendix. Nothing could be removed without losing information.

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 single-parameter read tool with no output schema, the description plus annotations cover what an agent needs to invoke it correctly. The only real gap is guidance on sourcing the response_id or handling a missing record.

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 a single required parameter and schema coverage is 100%, with the pattern constraint documented in the schema itself. The description adds nothing about the id format or where to obtain the id, so the baseline 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 ("Get one response by id") plus the scope "with all its fields," which clearly separates it from the list_responses sibling. It does not explicitly name an alternative, so it falls short of full sibling differentiation.

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?

"by id" implies this is the single-record lookup versus galaxydigital_list_responses, but the description never states when to prefer each or what happens if the id is unknown. Usage is inferable from the sibling naming rather than stated.

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