TimeChimp MCP Server

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

With no annotations provided, the description carries the full burden of behavioral disclosure. 'Update an existing mileage entry' implies a mutation operation but doesn't specify whether it requires special permissions, if changes are reversible, what happens to omitted fields (partial vs. full updates), or any rate limits. For a complex mutation tool with 12 parameters, this leaves critical behavioral traits undocumented.

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 a single, efficient sentence with zero wasted words. It's front-loaded with the core action ('Update an existing mileage entry') and doesn't include any redundant or verbose phrasing. Every word earns its place.

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 (12 parameters, nested objects, no output schema, and no annotations), the description is insufficiently complete. It doesn't explain what the tool returns, error conditions, or behavioral nuances like partial updates. For a mutation tool with rich input schema but no structured safety hints, the description should provide more contextual guidance to compensate.

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?

The schema description coverage is 100%, with each parameter well-documented in the schema itself (e.g., date format, distance units, enum values). The description adds no additional parameter semantics beyond what the schema provides. According to the rules, when schema coverage is high (>80%), the baseline score is 3 even with no param info in the description.

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 ('Update') and resource ('an existing mileage entry'), making the purpose unambiguous. It distinguishes from sibling tools like 'create_mileage' by specifying 'existing' and from 'delete_mileage' by using 'Update'. However, it doesn't explicitly differentiate from similar update tools like 'update_mileage_status' or 'update_mileage_client_status', which slightly reduces specificity.

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 (e.g., needing an existing mileage ID), exclusions (e.g., what fields can't be updated), or when to choose this over other update tools like 'update_mileage_status'. The agent must infer usage from the name and schema alone.

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