Create Time Entry

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

The description adds the creation intent, which is consistent with the destructiveHint=false annotation (creation is non-destructive). However, it does not disclose behavioral details such as permissions required, whether duplicate entries are allowed, or what the response format is.

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, short sentence that is front-loaded and easy to parse. It is concise but not overly terse.

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 and the existence of sibling tools that could be confused, the description is incomplete. It does not explain important constraints (e.g., cannot specify both duration and start/end) or what the tool returns upon success.

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 description adds minimal value beyond the schema, only hinting at flexibility without clarifying the mutual exclusivity between duration and start/end times.

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 'Create a new time entry', which clearly specifies the verb and resource. It mentions 'flexible time parameters', hinting at alternatives in time specification but does not explicitly differentiate from siblings like 'start_timer' or 'edit_time_entry'.

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 such as 'start_timer' (for starting a running timer) or 'edit_time_entry' (for updating). Usage context is only implied by the tool name.

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