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

Annotations already declare destructiveHint=true and non-idempotent/non-read-only, so the safety profile is covered structurally. The description adds real behavioral consequence: approval=auto 'can publish as soon as a post is submitted,' and approverRole=approver restricts who can approve/request-changes/reject and notes only admins can change that field. It doesn't say what happens to unmentioned settings or confirm the change's reversibility, so it stops short of a 5.

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?

Front-loads the core purpose, then handles the sibling routing and the two risky enums before a compact 'Related:' list. Dense em-dash chaining makes it slightly run-on, but every sentence earns its place and nothing is wasted.

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?

An output schema exists, so return values need not be described. Given 7 parameters, 4 enums, and a destructive mutation, the description covers purpose, alternative routing, enum consequences, and authorization constraints — an agent has everything needed to invoke it correctly and safely.

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 baseline is 3, but the description meaningfully deepens the enum semantics beyond the one-line schema entries: approval=required vs auto with its publication consequence, and approverRole's admin-only authorization implications. The remaining params (notes, active, icpFit, bioDestination) are left to the schema.

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 ('Updates a channel's settings, including approval mode') and immediately scopes out what it does NOT cover by pointing posting frequency to update_posting_slots. An agent can distinguish it from siblings like update_posting_slots and list_channels without opening a 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?

Explicitly routes the agent to update_posting_slots for cadence, gives a conditional rule for approval=auto ('only use auto when the workspace has chosen to skip review for that channel'), and lists related tools. When-to-use and when-not-to-use are both present.

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