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

Annotations supply only destructiveHint=true and a title, so the description carries nearly the full burden. It adds the REST endpoint (POST /api/v1/permissions), which is contextual but not behavioral: it says nothing about key uniqueness/collision behavior, whether creation is idempotent, required scopes, or what happens to the permission on failure. No contradiction with annotations, but little added beyond them.

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?

Two short sentences with the purpose front-loaded; nothing is bloated or buried. The endpoint reference ('Kinde: POST /api/v1/permissions') is marginal filler for an agent but costs little.

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 simple create with full schema coverage and no output schema, the minimum is arguably met: resource, scope of use, and endpoint are stated. Still missing are the behavioral facts an agent would need to call it safely (uniqueness of 'key', failure/repeat behavior), which the annotations do not cover.

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 100% (key, name, description all documented), so the schema already carries parameter meaning and a baseline 3 applies. The description adds no syntax, format, or constraint detail about the three fields beyond what the schema states.

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 states a specific verb and resource ('Create a permission') and even clarifies that permissions are held by roles and users, which helps distinguish it from kinde_create_role. It stops short of explicitly naming the sibling tools or the boundary between them, so it is clear but not fully differentiated.

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 statement of when to use this tool versus alternatives such as kinde_create_role or kinde_create_organization, nor any prerequisites (e.g., whether the key must be unique or whether the permission must later be granted). The only hint is the phrase 'roles and users can hold', which implies downstream use but gives no actionable routing guidance.

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