evaluate_permission_tool

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

No annotations are provided, so the description carries the full burden of disclosing side effects, permissions, or error behavior. It only mentions return values ('decision, matched rules, and risk score'), which are likely covered by the output schema. It does not state whether the operation is read-only, whether it modifies state, or what happens with invalid input.

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 concise and front-loaded with the main purpose, followed by return-value summary. It avoids unnecessary words and is well-structured. However, it could be improved by integrating parameter details without becoming verbose.

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?

Despite having an output schema and only two parameters, the tool involves nested objects and no annotations. The description does not cover prerequisites, edge cases, or input formatting, making it insufficient for an agent to confidently invoke the tool in all situations. It is more complex than a simple filtered-list tool and requires more context.

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%, yet the description does not explain the meaning or structure of the 'action' or 'policy_rules' parameters. It briefly references 'policy rules' but fails to define expected fields, formats, or examples, leaving the agent without enough information to construct valid inputs.

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 tool's purpose with a specific verb ('Evaluate') and resource ('whether an agent action is allowed under the given policy rules'). It distinguishes itself from siblings by focusing on permission evaluation, whereas siblings address failure detection, reliability scoring, and audit reports.

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 guidance is provided on when to use this tool versus alternatives. The description implies a use case for policy compliance, but it does not explicitly mention exclusions, prerequisites, or refer to sibling tools for different scenarios.

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