create_exclusions

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

Annotations already declare readOnlyHint=false, destructiveHint=false, idempotentHint=true, and the description's POST/Create framing is consistent with these—no contradiction. The description adds a bit of operational context (the endpoint and the schema-first workflow), but it does not disclose what the response returns or any side effects beyond what annotations imply. With annotations carrying the safety profile, the description's thin additional context earns a 3.

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 tight—three short lines plus a compact Arg note—with 'Create ImportListExclusion' front-loaded before the endpoint. There is minimal waste, though 'Create ImportListExclusion' somewhat restates the tool name and the POST line adds limited new information. It is efficient and well-structured, just not maximally so.

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 create tool whose body is an opaque additionalProperties:true object, the description is thin. The output_schema exists and annotations are present, which lightens the burden, but the agent is essentially told to go read another endpoint to construct the payload. Nothing explains what an exclusion is, what fields matter, or how this differs from create_exclusions_bulk. Adequate but with clear gaps for a black-box-body create operation.

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 coverage is 0%, and the schema only defines 'body' as an open object with additionalProperties: true. The description compensates partially by explaining body = 'Request payload' and pointing the agent to GET/schema endpoints to discover the expected fields. This adds direction beyond the bare schema, but it supplies no actual field semantics and leaves the agent to discover them externally, so it only partially fills the 0% coverage gap.

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+resource: 'Create ImportListExclusion' plus the endpoint 'POST /api/v3/exclusions'. This is clear and not a tautology, and the POST line reinforces the operation. However, it never explains what an ImportListExclusion is (e.g., excluding movies from automatic import) and does not differentiate it from the sibling create_exclusions_bulk, so it is not fully distinct from its siblings.

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 guidance on when to use this tool versus alternatives. It never mentions create_exclusions_bulk for bulk needs, nor update_exclusions_by_id or delete_exclusions_by_id for the lifecycle. The only directional hint—'Read the matching GET or the /schema endpoint first'—is a discovery tip for the payload, not a usage condition. No explicit when/when-not guidance is provided.

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