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

With no annotations, the description carries the full burden and does a reasonable job: it discloses patch semantics ("only what you pass changes"), a prerequisite (saved slides), latency (~1 min), and the cost split (free to configure, 17 credits/min for presentation voice). It does not cover permissions, reversibility, or response shape, which keeps it off a 5.

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?

Four compact clauses, each carrying a distinct fact (scope, merge semantics, prerequisite, latency/cost), with the scope statement front-loaded. Slightly telegraphic style but no wasted sentences.

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?

There is no output schema and no annotations, and the tool has 22 parameters, so the description should do more. It adequately covers behavior, cost, and prerequisites, but leaves a third of the parameters unexplained and says nothing about what the call returns or confirms.

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 only 68% across 22 parameters, and several (volume, denoising_mode, dynamic_voice_speed, backchannel_frequency, dynamic_responsiveness, interruption_sensitivity, ambient_sound_volume) have no description at all. The tool description adds no per-parameter guidance — no units, defaults, or interaction notes — so the undocumented params stay undocumented.

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 resource and scope: the Slide Presenter's own voice and model, explicitly excluding the website widget voice. This distinguishes it from set_agent_voice and widget-voice tools. The verb is implied by the tool name rather than restated, which is acceptable but keeps it short of 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?

"Needs saved slides" gives a real prerequisite, and the widget-voice exclusion signals a boundary. However, it never explicitly says when to use this instead of set_presentation_slides, set_agent_voice, or set_telegram_voice_settings, so the agent must infer the routing.

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