tummy_times_create_tummy_time

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

No annotations are provided, so the description carries the burden of disclosing behavior. It only says 'Record a tummy time session' and does not mention side effects, persistence, whether a timer is stopped, or any validation constraints. This is minimal at best.

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 sentence with no filler or redundancy, making it efficient and easy to parse. However, it is very sparse, so it earns high marks for conciseness rather than informational richness.

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 schema covers all parameters and an output schema exists, an agent has enough to construct a valid call. Still, with no annotations and no description of the create behavior or timer semantics, the definition is only minimally viable rather than fully self-explanatory.

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 the baseline is 3; the schema already documents all six parameters including timer_id and milestone. The description adds no additional meaning, but the schema sufficiently compensates.

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 states a clear verb ('Record') and a specific resource ('a tummy time session'), which unambiguously signals a create operation. It does not simply repeat the tool name, though it could name siblings to sharpen differentiation from update/list tummy time tools.

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?

There is no guidance about when to use this tool versus alternatives like tummy_times_update_tummy_time or timers_create_timer. The context is only implied by the tool name and sibling list, not stated explicitly.

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