Set time

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

Annotations already declare the mutation profile (readOnlyHint=false, idempotentHint=true, destructiveHint=false), so the safety picture is covered. The description adds nothing behavioral beyond that, and the cryptic rules line conveys no operational context such as what existing time settings are overwritten or whether the change requires a re-run.

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 core sentence is front-loaded and wastes no words. The trailing rules reference is opaque but very short, so it does not bloat the definition.

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?

For a simple 2-parameter tool with 100% schema coverage and annotations carrying the safety profile, the description is adequate but thin. Given the many confusingly similar time/result siblings, it should say more about scope (simulation setup vs. result playback) to be 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?

Schema coverage is 100%, so t_end and t_begin are already fully documented in the schema. The description only restates the 'end time' concept and adds no extra meaning (no units, ordering constraints, or interaction between t_begin and t_end beyond what the schema provides), so 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 states a specific verb+resource ('Set the simulation end time'), which is unambiguous on its own. It does not, however, differentiate this from closely named siblings like result_set_time (playback time) or set_run_options, so an agent must infer the distinction.

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 statement of when to use this tool, when not to, or which alternatives exist. The bracketed rules reference ('GEN-016, SIM-002, FIRE-005') points to a knowledge-search convention but gives no actionable selection guidance.

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