bookshelf_get_command

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

Annotations already declare readOnlyHint=true, so the read-only nature is covered. The description adds the 'single by id' scoping but no additional behavioral context such as not-found behavior, auth prerequisites, or response characteristics. This is acceptable given the annotation, but not rich.

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?

One clean, front-loaded sentence with zero waste. It is appropriately sized for a simple get-by-id tool, though slightly under-specified by not including a sibling reference or parameter clarification that could be added without losing conciseness.

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?

The tool is simple, has good annotations (readOnlyHint), and an output schema. However, missing usage guidelines and parameter semantics leave it minimally complete. It is adequate for an agent to infer the call, but lacks explicit contextual support for correct selection and invocation.

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?

Input schema has 0% description coverage for the id parameter. The description's 'by id' merely restates the parameter name and does not explain where the id comes from, its format, or how to obtain it (e.g., from list_command). Thus it fails to compensate for the missing schema descriptions.

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?

Description uses specific verb 'fetch' with resource 'single command' and scope 'by id', clearly distinguishing from list_command which fetches multiple commands. The phrase 'single' inherently differentiates from siblings within the same resource family.

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?

No explicit guidance on when to use this tool versus alternatives. Usage is implied by the phrase 'single command by id', but there is no mention of list_command for id discovery or any exclusions. This is the minimum viable level.

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