set_chat_permissions

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

Annotations already indicate the operation is not read-only, not destructive, and idempotent. The description adds minimal behavioral context beyond scope ('default permissions for all members' vs. individual permissions). It does not disclose additional effects such as how existing member permissions are affected or whether changes are reversible, but given annotations cover the safety profile, a score of 3 is reasonable.

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, front-loaded sentence that conveys the core purpose without redundancy or filler. It is appropriately concise for what it does state.

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?

Despite having only 3 parameters and no output schema, the description is too minimal. It does not explain the 'permissions' object structure, provide usage guidance relative to sibling tools, or describe return values/behavior. An agent would struggle to correctly invoke the tool without additional context.

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 only 33% (only 'chat_id' has a description). The tool description does not enrich the meaning of the 'permissions' parameter (which expects a permission object) or 'use_independent_chat_permissions' (likely a boolean toggle). Since schema coverage is low, the description should compensate but fails to explain parameter structure or behavior.

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 action ('Set default permissions') and the target scope ('all members in a group/supergroup'). This distinguishes it from sibling tools like 'set_chat_title' (which sets a title) and 'restrict_chat_member' (which restricts individual members).

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 usage context by specifying 'default permissions for all members,' which suggests it is for group-wide defaults rather than per-member restrictions. However, it does not explicitly state when to use this tool versus alternatives like 'restrict_chat_member' or mention any exclusions or prerequisites.

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