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

Annotations already declare readOnlyHint/idempotentHint/destructiveHint=false, so safety is covered. The description goes beyond that by disclosing the output's prioritization logic (owned tools surfaced at $0 first), the minimal-stack guarantee, and the presence of cost and risk warnings, which is meaningful behavioral context in the absence of an output schema.

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?

A single dense sentence that front-loads inputs and then enumerates outputs with no filler. It is somewhat packed with parenthetical asides, which costs a little readability 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 7-parameter, zero-required, read-only tool with no output schema, the description is the only place the return shape can be learned and it covers that thoroughly (per-capability options, minimal stack, incremental monthly cost, warnings). An agent has enough to call it correctly.

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 only 43%, so the description must compensate; it maps most inputs to intent — outcomes as 'free text or capability slugs' (query/capabilities), 'what they already own' (owned_tools), and skill, collaboration and data sensitivity as warning triggers. Only team_size is left unaddressed.

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+resource ('recommend ... stack') and pins the scope to a cheapest/minimal stack, plus what it returns (per-capability options, owned tools at $0 first, incremental monthly cost, warnings). This clearly separates it from get_pricing or search_catalog, though it never names a sibling to route against, so it stops short of a 5.

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 only implied by the input framing ('Given the outcomes the user needs ... and what they already own'). There is no explicit when-to-use, when-not-to-use, or named alternative such as compare_solutions or find_alternatives, leaving the agent to infer the routing condition.

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