Evaluate Access Permission

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

Annotations already indicate readOnlyHint=true and destructiveHint=false, so the description does not need to repeat that. It adds that the tool returns permit/deny, which is behavioral, but no additional context on authentication, rate limits, or side effects. Given the annotations, the description is adequate but minimal.

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 at three sentences with no redundant information. It front-loads the purpose and adds a clarifying statement about the distinction from Consent.

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, the description covers the core functionality (evaluate permission, return permit/deny) and clarifies the separation from consent. It lacks mention of edge cases or default behavior but is sufficient for a straightforward evaluation tool.

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?

The input schema has 100% coverage, so baseline is 3. The description does not add any extra meaning or context for the parameters beyond what the schema already provides (action enum, subject and resource strings).

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 evaluates R6 Permission resources for access control decisions and returns permit/deny. It specifically mentions the resource type (R6 Permission) and the output, and distinguishes from Consent records. No sibling tool performs this exact function.

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 provides some context by separating Permission from Consent, implying when to use this tool (for access control) vs. a consent-related tool. However, it does not explicitly state when to use or not use this tool, nor does it name any alternative tools.

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