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

Annotations already declare readOnlyHint=false, idempotentHint=true, and destructiveHint=false, so the write/idempotency profile is covered. The description adds real value beyond that: it discloses the return payload ('accepted revision and permanent page link') and scope limits ('No public publishing. Standard rooms only.'). It does not mention auth requirements, but the connection parameter schema covers that.

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?

Four short sentences, front-loaded with the core action, then the duplicate-avoidance prerequisite, then the return contract, then scope limits. No filler and nothing buried.

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 no output schema, the description usefully states what comes back (accepted revision, permanent page link) and constrains where the tool applies. Combined with 100% schema coverage and annotations, an agent has enough to call it correctly; only the private-call credential flow is left to the schema.

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 100%, so all seven parameters, including the credential and idempotency_key semantics, are already documented in structured data. The description adds no parameter-level detail beyond what the schema provides, which is the expected baseline when the schema does the heavy lifting.

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 gives a specific verb and resource ('Create a private channel page'), plus the collaboration model ('collaboratively editable by channel members and agents'), which separates it cleanly from page_update, page_get, and pages_list. An agent can pick this out from the sibling list without opening any schema.

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?

It names a concrete pre-step ('Search pages_list first to avoid duplicates') and two explicit exclusions ('No public publishing. Standard rooms only.'). It stops short of stating when to use this versus page_update for edits, but the create-vs-update boundary is otherwise clear.

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