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

There are no annotations, so the description carries the full transparency burden. It discloses the exact return content, the deliberate omission of identifiers (SEC-PM-006), and the authentication precondition. It doesn't mention pagination or error behavior, but the disclosed security constraint is valuable.

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?

Two compact sections: one for behavior/return constraints and one for access instructions. The 'ACCESS:' marker makes the operational requirement scannable, though the authentication hint is slightly verbose relative to the rest.

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?

With only two well-documented parameters and no output schema, the description supplies the essential missing context: what is returned, what is never returned, and what precondition must be met. It omits pagination and failure modes, but those are less critical for this simple metadata list.

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?

The input schema already has 100% description coverage for both parameters, including types and patterns, so the description does not need to repeat them. It adds no deeper semantic layer beyond implying that the member belongs to the specified circle.

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 precise verb and resource: 'List a Circle member's channels.' It further clarifies the scope by noting that only metadata is returned, which distinguishes it from related member/channel tools like list_circle_members and add_circle_member_channel.

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?

Provides explicit access prerequisites (Proof account) and a clear authentication workflow, including the warning that start_login does NOT open this tool. It does not explicitly compare against sibling alternatives, but it gives strong contextual guidance for when the tool can be invoked.

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