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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so safety is fully covered by structured fields. The description adds nothing beyond that — no note on auth requirements, rate limits, error behavior for a missing/invalid id, or return shape.

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 short fragments, front-loaded with the resource and scoping ('One service territory by id'). The trailing REST path is mildly redundant but cheap for an API-aware agent.

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 one-parameter read-only getter with full schema coverage, this is minimally sufficient, but with no output schema the agent gets no sense of what a territory object contains or what happens on an invalid id.

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% and the single required parameter carries its own description ('The Zenbooker id...'). The description's 'by id' merely echoes that, 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+resource: fetch one service territory by id, and pins it to a concrete REST path. It is clear what the tool does, but it never names list_territories or otherwise distinguishes itself from the sibling that returns the same resource in bulk.

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 phrase 'by id' weakly implies single-record retrieval versus a list, but there is no explicit when-to-use guidance, no mention of list_territories as the alternative, and no prerequisite such as needing an id obtained from that list call.

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