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

Goes beyond annotations in two meaningful ways: it clarifies that a reading is permanent and cannot be removed with this server, and that a meter notification may auto-create a work order when its condition is met — a downstream side effect the agent could not infer from destructiveHint/openWorldHint alone. It does not mention retry behavior, though idempotentHint=false makes duplicates a real risk worth flagging.

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 with the operation type front-loaded and the consequential facts following. No filler text.

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?

A three-parameter write tool with full schema coverage and clear annotations is well served by this description: creation semantics, irreversibility, and automated work-order side effects are all covered. The only gap is that, with no output schema, it never says what the call returns (presumably the created reading).

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 all three parameters are documented in the schema itself; the description adds no syntax or constraint detail. The embedded endpoint path POST /meters/{id}/readings is marginally useful but not new parameter meaning.

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 ("record a new reading on a meter") and grounds it with concrete examples of reading types. The "WRITE:" prefix immediately separates it from read-only siblings such as upkeep_list_meter_readings or upkeep_get_meter.

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 WRITE marker and side-effect notes imply this is the creation path, but the description never names an alternative or states when not to use it (e.g. versus upkeep_list_meter_readings or update tools). Usage is inferable rather than explicit.

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