Today summary

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It accurately conveys that the tool produces a summary (read-only operation) and specifies the return content, which is sufficient for a simple query tool. However, it does not address potential nuances such as timezone handling or inclusion of running timers, which could be relevant.

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, well-structured sentence that provides all necessary information without redundancy. It is front-loaded with the main action and includes specific output details, making it highly efficient and easy to parse.

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's low complexity (one optional parameter, no output schema), the description is complete enough to understand the tool's purpose and expected results. It specifies the key outputs and the scope ('today'), though a mention of what 'today' means (e.g., timezone) would make it fully complete.

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 has one parameter with a description ('Workspace ID override.'), achieving 100% schema_description_coverage. The description adds no additional parameter information, so it does not enhance beyond the schema, but the schema is adequate. Baseline 3 applies.

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 with a specific verb ('summarizes'), a specific resource ('today's tracked time'), and enumerates the exact outputs (total duration, entry count, per-project totals). This distinguishes it from sibling tools like clockify_list_time_entries, which provide detailed entries rather than a summary.

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 its use case (getting a high-level overview of today's time tracking) but does not explicitly state when to use it instead of alternatives or mention any exclusions. There is no comparison to sibling tools or scenarios where a list or detail tool would be more appropriate.

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