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

With no annotations, the description carries the behavioral burden and does well by explaining the access-control behavior: owner-key members see account/private and owned public threads, while access keys see all open public threads. It does not mention pagination or ordering, but the core security-scoped behavior is disclosed.

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 concise sentences, front-loaded with the action and resource, followed by the important credential-aware behavior. No filler or redundant repetition of the tool name.

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?

The tool is simple with one optional parameter, fully documented in the schema, and the description covers the operation and credential-dependent scope. No output schema exists, but the return shape of a list operation is reasonably inferable; still, a brief note on output format or pagination would make it fully complete.

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 100%, so the parameter itself is already well documented. The description adds meaning by tying the owner_key/access_key credential type to the resulting visibility scope, which helps the agent understand how the single parameter affects output.

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 states a clear verb and resource: listing open deliberation threads for the caller's account. It also specifies credential-dependent visibility, but it does not explicitly distinguish itself from the closely named sibling discussion_list, so it misses full differentiation.

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 when to use the tool: to list open threads visible to the caller based on credential type. However, it gives no explicit guidance on when to prefer this over sibling tools such as discussion_list or discussion_get, leaving the choice partly to inference.

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