time_estimator

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

With no annotations, the description carries full burden. It clearly indicates the tool is a computational estimator (non-destructive) and describes return values. However, it does not mention authentication, rate limits, or whether it modifies any state. For a calculation tool, this is acceptable but not exhaustive.

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?

Two sentences effectively convey purpose, methodology, inputs, and outputs. No redundant information; every phrase contributes meaning. The structure is front-loaded with the core action and follows with essential details.

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 absence of an output schema, the description adequately mentions return values. It covers key parameters and methodology. However, it could briefly note that estimates should be positive numbers or that the PERT formula is used, but this is minor. Overall, it is sufficiently complete for a tool with moderate complexity.

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%, providing baseline. The description adds context about PERT methodology and configurable buffer, which enhances understanding beyond field descriptions. It explains the purpose of optimistic/realistic/pessimistic estimates and the buffer parameter, adding value.

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 estimates task duration using PERT methodology, specifying inputs (subtasks with optimistic/realistic/pessimistic estimates) and outputs (weighted expected time plus buffer). It distinguishes itself from sibling tools like burndown_calculator or priority_sorter by focusing on time estimation rather than tracking or sorting.

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 for estimating task durations with PERT but does not explicitly state when to use this tool versus alternatives or provide exclusions. It lacks guidance on prerequisites or scenarios where this tool is inappropriate.

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