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

Annotations already establish readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds valuable behavioral details: it returns a deterministic execution order or concrete blockers, and it discloses pricing ('x402 price is $0.002 USD per call'). This goes beyond the annotations and helps the agent anticipate side effects and cost.

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?

The description is three sentences, but the second sentence ('Intended for reliability quality / cannot select.') is confusing and detracts from concise communication. The first sentence is strong and action-focused; the third adds useful cost info. The structure could be improved by removing the ambiguous fragment and front-loading the exclusions more clearly.

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?

The description covers the core function and cost but lacks specific guidance on input construction (how to structure nodes/edges, what constraints mean, limits like maxItems), output format details beyond 'deterministic execution order or concrete blockers,' and error/graceful-failure behavior. Since there is no output schema, the description carries the burden of explaining return structure, and it does so only partially. Enough for a basic call, but not comprehensive.

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?

With schema description coverage at 0%, the description must compensate by explaining the parameters. It only vaguely references 'workflow dependencies and execution constraints' without mapping to nodes, edges, max_total_cost, or max_total_latency_ms. The schema itself has no descriptions, so an agent receives almost no semantic guidance for the 4 parameters, including the required ones.

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?

The description states a clear action: 'Validates caller-supplied workflow dependencies and execution constraints, returning a deterministic execution order or concrete blockers.' This specifies a verb (validates), a resource (workflow dependencies), and an output. It hints at differentiation from selection-oriented siblings via 'Intended for reliability quality / cannot select,' but the phrase is ambiguous and doesn't name a specific alternative, so it falls short of full sibling differentiation.

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 description provides negative guidance ('Do not use for legal, identity, sanctions, fraud, contractual, or regulatory adjudication') but no positive, actionable context for when to use this tool instead of other reliability_quality_control_plane_* siblings or execution_safety_control_plane. The phrase 'Intended for reliability quality / cannot select' is cryptic and not sufficient to route an agent. No alternative tools are named or distinguished.

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