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

The annotations already declare the operation is not read-only and has open-world side effects; the description adds meaningful behavior by warning that private rooms require a linked wallet and payment_options, and that names, descriptions and prices become public. This goes beyond the schema/annotations, though it stops short of describing the creation response or failure modes.

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?

Three short sentences with no filler; the main action and differentiation are front-loaded, followed by the key prerequisite and privacy caveat. Every sentence contributes.

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 state-changing tool with no output schema, the description covers the main branches (public/private), prerequisites, and public-visibility implications, and points to the guide for deeper setup. It does not describe response data or error scenarios, but these are partly outside the description's scope given the guide reference.

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?

With 0% schema description coverage, the description compensates well: it maps visibility to public free vs private paid, payment_options to the private-room requirement, and name/description to publicly visible fields. It does not cover duration_seconds or explain value formats, but the schema provides those constraints, so the description adds meaning for the core parameters.

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 opens with the verb 'Create' and the resource 'room', and immediately distinguishes public free from private paid rooms, separating this creation tool from read-oriented siblings like get_room, list_rooms, find_rooms, and room_activity. The scope and core variants are unambiguous.

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?

It states when private rooms are appropriate (need linked wallet and payment_options) and points to the guide, giving clear context for choosing the right configuration. It does not name an alternative tool because no sibling creates rooms, but the visibility constraint is clearly communicated.

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