brilliant-directories-mcp

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

No annotations are provided, so the description carries full burden but offers no behavioral disclosure. It does not indicate if this is a read-only operation, what permissions are needed, how data is returned, or any rate limits. The description fails to add any context beyond the basic action.

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 extremely concise with a single phrase, 'Get user subscriptions', which is front-loaded and wastes no words. While under-specified, it is structurally efficient with no redundant information.

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 complexity of a tool with no annotations, 0% schema coverage, no output schema, and many sibling tools, the description is incomplete. It lacks essential details about behavior, parameters, and usage, making it inadequate for effective tool selection and invocation.

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 0%, and the description provides no information about the 'user_id' parameter. It does not explain what the parameter represents, its format, or any constraints. With one required parameter and no schema descriptions, this leaves the parameter undocumented.

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 'Get user subscriptions' restates the tool name with minimal elaboration. It specifies the verb 'Get' and resource 'user subscriptions', but lacks detail on what subscriptions entail or how it differs from sibling tools like 'getUser' or 'getUserTransactions'. This is a tautology with only basic differentiation.

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?

No guidance is provided on when to use this tool versus alternatives. The description does not mention prerequisites, context, or exclusions, leaving the agent with no usage direction. This is a significant gap for a tool in a large set of sibling tools.

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