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

Annotations already establish readOnly=false and destructiveHint=false, so the description is not responsible for the safety profile. It adds one boundary ('does not publish the agent itself') that is a genuine behavioral clarification. However, it does not discuss reversibility, whether deactivation impacts existing traffic, or any permission requirements, so the added transparency is minimal.

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 text contains two tight sentences with zero waste. The primary verb + resource is front-loaded, and the differentiating 'does not publish the agent itself' is a meaningful clarifier, not filler.

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 simple 2-parameter toggle with no output schema, the description is largely sufficient: it covers the operation and its boundary. It could still mention what activation/deactivation actually changes for the channel, but given low complexity and no output schema, the remaining gaps are minor.

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%: both 'active' and 'deployment_id' are already fully documented. The description adds no parameter-specific meaning beyond what the schema does, so the baseline of 3 is appropriate.

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 opens with 'Activate or deactivate a deployment channel', which clearly identifies the action and the resource. The closing clarification 'Serves the CHANNEL; it does not publish the agent itself' distinguishes it from agent-publishing/creation siblings, so an agent can tell it apart from create/update_deployment and validation tools.

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 useful context ('Serves the CHANNEL') but does not explicitly tell an agent when to use this tool versus alternatives like update_deployment, probe_deployment, or activate_governance_policy. There is no 'when not to use' exclusion or a pointer to a sibling, so usage guidance is implied rather than explicit.

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