get_copybook

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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the description adds marginal value by noting the dependency on 'configured copybook PDS locations'. It does not disclose additional behavioral traits like error handling or performance, but with strong annotations, a score of 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?

The description is a single sentence that states the core functionality without filler. It is front-loaded and every word is essential for conveying the tool's purpose.

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 the tool's simplicity (one array parameter) and the presence of an output schema, the description covers the basic purpose. However, it lacks details about configuration or expected input format, which could be helpful for agents, especially given the large number of sibling tools.

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%, so the description must compensate, but it only reiterates the parameter name 'copybook_names' without explaining its format, constraints, or usage (e.g., whether full member names are required). This fails to add meaning beyond the schema's basic type information.

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 clearly states the verb 'Retrieve' and the resource 'copybook members' from 'configured copybook PDS locations', which distinguishes it from sibling tools like get_cobol and get_jcl that handle other types of content.

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 description implies the tool is for retrieving copybook members but does not provide explicit guidance on when to use it versus alternatives or any exclusions. The mention of 'configured copybook PDS locations' offers some context, but no direct comparison to siblings.

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