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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so the safety profile is covered elsewhere. The description adds nothing behavioral beyond restating the HTTP verb/path — no note on what happens for an unknown id, error behavior, or response 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 telegraphic fragments with zero padding, resource scope front-loaded. It leans toward under-specification rather than verbosity, but 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?

For a single-parameter read tool with full schema coverage and safety annotations, the essentials are present. It stops short of stating that it returns a single meter object or how a missing id behaves, which would fully round it out.

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 meter_id parameter carries its own description with a concrete example format. The description's "by id" merely echoes that; baseline 3 is appropriate when the schema does all the work.

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?

"One meter by id" plus the REST path GET /meters/{id} identifies a singular fetch of the meter resource unambiguously. It does not name upkeep_list_meters as the alternative, so sibling differentiation is only implicit through the singular phrasing.

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?

No statement of when to use this versus upkeep_list_meters or upkeep_list_meter_readings, and no preconditions. The agent must infer usage purely from the singular noun and the path template.

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