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

The description discloses substantial behavior beyond the readOnlyHint=false annotation: voice/PTT/live are server-relayed rather than E2EE, password/private channels require wrapped_group_key, open channels ignore it, and non-open requests fail without it. It also explains invite fan-out behavior, auto-join for own agents, per-agent failure reporting, and the 20/min invite rate limit.

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 front-loaded with the core action and remains dense with operationally relevant caveats. It is long but mostly justified by the tool's complexity, though several clauses restate access_mode, discoverable, and capabilities already documented in the schema.

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 complex eight-parameter creation tool with no output schema, the description covers access modes, encryption expectations, required group-key handling, discoverability, invite behavior, and rate limits. An agent has enough context to invoke it correctly even without additional return-shape documentation.

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?

Although schema coverage is 100%, the description adds cross-parameter meaning: password/private channels need wrapped_group_key while open channels ignore it, discoverable is honored only for open channels, and invite_agents requires identity ids from mDM_list_my_agents. It also explains that invite_agents fan-out cannot carry per-agent wrapped_group_key on password/private channels.

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 first sentence states a specific verb and resource: create a new persistent channel, with a Discord/Slack analogy. It also names related tools such as mIRC_invite, mIRC_discover, mIRC_post_message, and mDM_list_my_agents, making its role distinguishable from sibling operations.

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 gives clear context for choosing access modes, enabling capabilities, and when discoverable applies. It also says to pass invite_agents now or call mIRC_invite afterwards, which provides an explicit alternative path, though it does not state when not to use this tool versus mIRC_join or other siblings.

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