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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered by structured data. The description adds the concrete return shape (id, transport, direction, endpoint, describe, enabled flags), which is genuinely useful given no output schema, but says nothing about pagination, ordering, or behaviour when the operator has no channels.

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?

Two tight sentences; the core action and scope are front-loaded and the field list follows as supporting detail. No filler, though the enumerated field list makes it slightly heavier than strictly needed.

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 one-parameter read with no output schema, the description compensates by disclosing the returned fields and the intended consumers. It leaves only minor gaps around empty results and ordering, which are not critical to calling the tool correctly.

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% and the single 'slug' parameter is documented in the schema as 'Operator slug.' The description adds no further meaning about the identifier, so the baseline of 3 applies.

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 ('List every channel attached to an operator') and enumerates the returned fields, so an agent knows exactly what it retrieves. It does not explicitly distinguish itself from near-name siblings such as test_operator_channels or get_sensor_channels, which keeps it short of a 5.

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 two usage contexts ('onboarding agent to confirm what is wired up' and 'status dashboards'), which implies when to reach for it. However there is no when-not guidance and no explicit alternative named, so usage is only implied rather than routed.

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