TimeChimp MCP Server

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

No annotations are provided, so the description carries full burden for behavioral disclosure. 'Create a new mileage entry' implies a write/mutation operation but provides no information about permissions required, whether the operation is idempotent, what happens on failure, or what the response contains. For a creation tool with 11 parameters and no output schema, this minimal description leaves critical behavioral aspects unspecified.

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 at just four words, front-loading the essential information with zero wasted words. It follows the pattern of other sibling tools (e.g., 'create_contact', 'create_expense') consistently. For such a straightforward creation operation, this brevity is appropriate rather than under-specified.

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 tool's complexity (11 parameters including nested objects, 3 required parameters, no output schema, and no annotations), the description is insufficiently complete. It doesn't explain what a 'mileage entry' represents in the system's domain, doesn't mention typical use cases, and provides no information about the creation result. The 100% schema coverage helps but doesn't compensate for the lack of contextual understanding needed for proper tool 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 100%, so all parameters are documented in the schema itself. The description adds no parameter information beyond what's already in the structured schema - it doesn't explain relationships between parameters, provide examples, or clarify dependencies. The baseline score of 3 reflects adequate coverage through the schema alone, though the description contributes nothing additional.

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 verb ('create') and resource ('mileage entry'), making the purpose immediately understandable. It distinguishes this from sibling tools like 'update_mileage' or 'get_mileage' by specifying it creates a new entry rather than modifying or retrieving existing ones. However, it doesn't explicitly differentiate from other creation tools like 'create_expense' or 'create_project' beyond the resource type.

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 no guidance on when to use this tool versus alternatives. It doesn't mention prerequisites (like needing existing customer/project/vehicle/user IDs), doesn't explain when mileage creation is appropriate versus expense creation, and offers no context about typical workflows. With multiple sibling creation tools available, this lack of differentiation is a significant gap.

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