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

Annotations declare readOnlyHint=false, which would otherwise be puzzling for a read-style advisory tool; the description resolves this by disclosing that missing knowledge 'may create or update a tracked research demand' — a non-obvious side effect. It also asserts 'No device commands are executed', reinforcing the safety profile. No auth or rate-limit detail, but the key hidden side effect is surfaced.

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?

Three short sentences, zero filler, front-loaded with what is returned before the caveats. Each sentence carries distinct information: output, side effect, safety boundary.

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?

An output schema exists, so return-value detail is unnecessary, and the side-effect and safety notes cover the behavioral gap left by annotations. Only the two optional parameters (enabled_features, operating_system) are left unexplained.

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 0% across 5 parameters, so the description must compensate. 'Exact-model, exact-version' usefully signals that model/current_version/target_version are precise identifiers, but enabled_features and operating_system receive no mention at all, leaving half the parameter surface undocumented.

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 ('Return ... upgrade prerequisites, risks, checks, and rollback') scoped to 'exact-model, exact-version', and explicitly disclaims two things it does not do (no software download, no device commands). This separates it from device-facing siblings like analyze_device_snapshot and from generic lookups like query_network_knowledge.

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 the resource (pre-upgrade planning for a specific model/version pair) but there is no explicit when-to-use statement or named alternative among the 18 siblings. An agent can infer intent but is not routed between this and query_network_knowledge/query_domain_knowledge.

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