create_custom_metadata_providers

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

Annotations already convey readOnlyHint=false and idempotentHint=true; the description does not contradict them. It adds some value by revealing that the body schema must be discovered via GET or /schema, but it does not explain side effects, whether the operation can create multiple providers, or what 'act on' means.

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 short and organized into endpoint, args, and guidance. It avoids unnecessary detail, but the vague 'Create or act on' phrasing and the semi-redundant endpoint line keep it from being maximally tight.

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 tool with one free-form body parameter and an existing output schema, the description includes the crucial prerequisite (read GET/schema first) and the endpoint. It is complete enough for an agent to construct a request, though the ambiguous action semantics and lack of alternative guidance remain minor gaps.

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?

With 0% schema description coverage, the description compensates by identifying `body` as the request payload and directing the agent to the GET or /schema endpoint to learn the expected fields. This is useful because the body is an open object (`additionalProperties: true`), though it still omits concrete field examples.

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 identifies the resource (`custom-metadata-providers`) and includes a `POST` path, so an agent can tell this is the creation endpoint. However, the phrase 'Create or act on' is vague—'act on' does not specify what action is performed or what creating a provider entails, and it does not differentiate this tool from sibling list/delete providers beyond the HTTP path.

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 about when to use this tool versus alternatives such as list_custom_metadata_providers or delete_custom_metadata_providers_by_id. The only guidance is the prerequisite to read the matching GET or /schema endpoint first, which helps with invocation but not tool selection.

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