create_channel

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

With no annotations, the description carries the full behavioral burden and does so richly: tokens are returned exactly once and only hashes are stored (one-way consequence), messages are point-to-point, protected pins require consent of ALL roles, and slug/naming rules are given. These are exactly the operational facts an agent needs before calling a destructive, non-reversible credential-issuing tool.

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?

Three dense sentences with the admin restriction and the token-once warning front-loaded ahead of secondary detail. Nothing is wasted, though the final clause about pins, slugs, and limits in one sentence makes it slightly run-on.

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 2-param creation tool with no annotations, the description covers authorization, cardinality, token lifecycle, naming format, and intra-channel semantics; an output schema exists so return value structure need not be explained. Nothing an agent needs to call this correctly 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?

Schema description coverage is 0%, so the description must compensate, and it largely does: it clarifies that roles are 2..12 in count, and that both names and roles are lowercase slugs (letters/digits/dash/underscore, max 64 chars). It does not describe array ordering or duplicate-role handling, so it falls just short of full coverage.

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 specific verb and resource ('create a channel') and immediately qualifies it as an isolated mailbox shared by 2..12 named roles, which distinguishes it from siblings like list_channels, delete_channel, and add_role. The scope and object model are unambiguous.

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?

Gives clear usage context: 'ADMIN ONLY (HTTP transport)' and tells the caller to deliver tokens to agents immediately. However, it never names alternatives or states when not to use it (e.g., use add_role to expand an existing channel), leaving routing to sibling tools implicit.

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