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

Annotations already establish readOnly, idempotent, non-destructive, closed-world behavior, so the safety profile is covered. The description adds that the returned record includes the ruling, which is genuine content beyond the annotations, but says nothing about what happens when the case_id is unknown or lacks a ruling. No annotation contradiction.

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?

A single ten-word sentence with the scope-defining detail (the ruling) front-loaded after the core action. Nothing is redundant and nothing could be trimmed without losing meaning.

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 one-parameter read tool with full annotation coverage and an output schema that describes the return shape, the description covers the essentials. The only meaningful gap is the origin/format of case_id, which a slightly longer description could have closed.

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 single case_id parameter is documented nowhere beyond its name and type. The description does not say where the identifier comes from (for example list_cases or file_case) or what format it takes, leaving the one input underspecified even though its purpose is intuitive.

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?

"Fetch the full case record" names a specific verb and resource, and "full ... including any ruling" signals it returns the complete object rather than a summary, which implicitly separates it from list_cases. It stops short of naming any sibling explicitly, so the differentiation is inferential rather than stated.

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?

There is no explicit when-to-use guidance, no prerequisites, and no named alternative. The phrase "including any ruling" hints that a separate ruling lookup may be unnecessary, but the agent must infer that this tool is the detailed follow-up to list_cases rather than being told so.

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