permissions_set

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

The description adds value beyond the annotation (readOnlyHint=false) by clarifying that the operation replaces the entire ACL, implying a full overwrite. This is useful behavior context that the annotation alone does not provide.

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 of 10 words that conveys the core function without any wasted text. It is front-loaded with the main action.

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?

While an output schema exists and parameters are covered, the description lacks details on prerequisites, idempotency, or destructive nature. The differentiation from the sibling 'permissions_update' is only implicit, which may lead to confusion.

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 already describes all three parameters with 100% coverage, so the description does not add new param-level details. The baseline score is 3.

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 action ('Replace the ACL') and the resource ('for an object'), with the additional note that it uses POST. It implicitly distinguishes from 'permissions_update' by emphasizing full replacement, though not explicitly naming the sibling.

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 context ('POST replaces the entire ACL') but does not explicitly state when to use this tool versus alternatives like 'permissions_update' or 'permissions_get'. No when-not or exclusion criteria are given.

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