cronometer-mcp

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

No annotations are provided, so the description carries full burden. It states the tool performs a removal (destructive operation) but lacks details on permissions needed, whether the action is reversible, error handling, or what happens upon success. This is a significant gap for a mutation tool with zero annotation coverage.

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 efficiently structured with a clear purpose statement, usage guidance, and parameter explanation in three concise sentences. Every sentence adds value without redundancy, making it easy to parse and understand quickly.

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 has an output schema (which handles return values), no annotations, and low schema coverage, the description is moderately complete. It covers purpose, usage, and parameters adequately but lacks behavioral details like side effects or error conditions, which are important for a destructive 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?

The schema description coverage is 0%, but the description compensates well by explaining the 'biometric_id' parameter, including its purpose and an example value ('e.g. "BXW0DA"'). This adds meaningful context beyond the bare schema, though it doesn't cover all potential nuances like format constraints.

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 action ('Remove') and resource ('a biometric entry from Cronometer'), making the purpose evident. However, it doesn't explicitly differentiate from sibling tools like 'remove_food_entry' or 'delete_fast', which also perform removal operations on different resources.

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 clear context for when to use this tool by referencing 'get_recent_biometrics to find biometric_id values', indicating a prerequisite step. It doesn't specify when not to use it or name explicit alternatives, but the guidance is practical and helpful for correct invocation.

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