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

No annotations are supplied, so the description carries the burden; 'Read' correctly signals a non-mutating operation, and it usefully enumerates what comes back (schedule, next_unix, last_run_id, last_status). It says nothing about authorization requirements or rate limits, and tenant_key's auth semantics are only covered in the schema.

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?

A single front-loaded sentence with zero filler; the verb, scope, and return fields are all in the first clause. Nothing needs trimming.

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, listing the returned fields is the right compensating move, and 100% schema coverage handles the parameters. Minor gaps remain around failure modes and how the fields relate to sibling trigger state (e.g., last_status values), but for a simple read tool this is nearly complete.

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 both id and tenant_key (including the Bearer-header precedence rule) are already documented in the schema. The description adds no parameter-level meaning beyond that, so the baseline 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 (Read) and resource (one trigger) and enumerates the returned fields, which distinguishes it from the sibling host.trigger.list and the mutation tools fire/pause/resume/set/remove. It does not explicitly name a sibling, but the singular 'one trigger' scoping is clear.

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?

Usage is implied by 'Read one trigger's current schedule' — fetch the current state for a known id. There is no explicit when-to-use guidance, no mention of host.trigger.list as the alternative for enumerating triggers, and no statement about error/not-found behavior.

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