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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so safety is covered. The description adds real value on top: the output is 'bounded', it mirrors another tool's payload, and it performs no CSV inspection, which tells the agent this is a metadata-only lookup rather than a content validator. Error, pagination or auth behavior is still unstated, keeping it short of a 5.

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 sentences, both load-bearing: the first defines the return payload, the second gives the invocation condition and the negative scope. The when-to-use cue is front-loaded after the purpose, with no filler or restated title 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?

For a zero-parameter alias with no output schema, the description names the returned metadata categories (deployment, scope, payment) and rules out CSV work, which is enough for correct invocation. It does not describe the payload's shape or size, but annotations already carry the safety profile and no output schema exists to document returns.

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?

The tool takes zero parameters, so the baseline is 4 and there is nothing for the description to compensate for. The description correctly implies a no-argument call by describing the result as fixed bounded metadata.

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 ('Return') plus the exact resource classes (bounded deployment, scope and payment metadata) and frames itself as a compatibility alias for hmi_preflight_service_info. It also draws a hard boundary against the CSV-inspecting siblings with 'it does not inspect CSV content', so an agent can separate it from check_hmi_import_csv and audit_factorytalk_import without opening any schema.

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?

Gives an explicit selection condition: use this name when an existing FactoryTalk Preflight connection exposes factorytalk_product_status, which names the alternative (hmi_preflight_service_info) by reference. It stops short of stating the inverse rule ('otherwise call hmi_preflight_service_info'), so the routing is strongly implied rather than fully spelled out.

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