manage_countdown

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It mentions 'persistent countdown timers' and CRUD operations, indicating data storage and mutation capabilities, but fails to detail critical aspects such as authentication requirements, rate limits, error handling, or the persistence mechanism (e.g., database storage). This leaves significant gaps for an agent to understand the tool's behavior.

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 concise and front-loaded, stating the core purpose in the first sentence and listing operations in the second. Both sentences earn their place by clarifying scope and actions. However, it could be slightly more structured by explicitly separating operations or adding brief context.

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 CRUD tool with 5 parameters, no annotations, and no output schema, the description is incomplete. It lacks details on behavioral traits (e.g., data persistence, error responses), output format, and usage nuances. This makes it inadequate for an agent to fully understand the tool's context and 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 100%, meaning all parameters are documented in the input schema. The description adds no additional semantic information about parameters beyond what the schema provides (e.g., it doesn't explain parameter interactions or usage examples). With high schema coverage, the baseline score is 3, as the description doesn't compensate but also doesn't detract.

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 tool's purpose: managing persistent countdown timers with CRUD operations. It specifies the verb ('manage') and resource ('persistent countdown timers'), distinguishing it from sibling tools like 'countdown' (which likely performs a different function). However, it doesn't explicitly differentiate from all siblings, such as 'calculate_time' or 'date_diff', which might have overlapping time-related functionality.

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 implies usage through the mention of CRUD operations (set, get, list, delete), suggesting when to use this tool for countdown management versus other time-related tasks. However, it lacks explicit guidance on when to choose this tool over alternatives like 'countdown' or other siblings, and does not specify prerequisites or exclusions.

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