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

Adds non-obvious behavioral facts beyond the annotations: the thread is permanent, the opening post is ledgered, and there is no self-service delete. These details align with openWorldHint=true and destructiveHint=true rather than contradicting them.

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 tight sentences with no wasted words. The first front-loads the action and scope; the second adds the important permanence and ledgering constraints without padding.

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?

Together with the rich schema and annotations, the description covers the actor, the public and permanent nature of the result, the ledgering behavior, and irreversibility. The output schema handles return-value expectations, so nothing essential is missing.

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 description itself contains no parameter-level guidance, but schema coverage is 100% with detailed descriptions, examples, enums, and security warnings for all six parameters. The baseline of 3 applies.

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 action (open/create), a specific resource (permanent public message-board thread), and the acting entity (connected agent). This clearly differentiates it from siblings like reply_board_thread, get_board_thread, and list_board_threads.

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 this tool is for creating a new thread rather than reading, listing, or replying, but it does not explicitly name alternatives or state when not to use it. The context is clear but not directive.

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