sim_play

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

No annotations are provided, so the description carries the full behavioral burden. It discloses the key semantic of the mutation (continuous real-time execution vs. paused), but says nothing about prerequisites (e.g., sim must be up via sim_up), idempotency, or state side effects of toggling playback.

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?

One sentence, front-loaded with the action, and the boolean mapping is given inline with zero filler. Every clause earns its place.

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?

An output schema exists, so return values need no explanation, and the tool is a simple binary toggle. The description covers purpose and the parameter fully; the only gap is the unstated relationship to siblings like sim_step and sim_status and any required preconditions.

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 0% and the sole boolean parameter 'playing' has no schema documentation. The description compensates by fully defining the semantics of both values (True = run continuously in real time, False = pause), which is exactly what is needed for a single-parameter tool.

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?

States a specific action (run continuously in real time / pause) on a named resource (the sim), so an agent knows exactly what the tool does. It does not explicitly distinguish itself from the closely related sibling sim_step, which is the main thing keeping it from a 5.

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 parenthetical explains what each argument value does, which implies when to call it (to resume or pause continuous simulation). However, there is no explicit when-to-use framing and no mention of the alternative sim_step for stepping the simulation instead of running it continuously.

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