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

Annotations already declare readOnlyHint=true and destructiveHint=false. The description adds context about the scope (public index) and return format (ranked entries with URLs and summaries), which goes beyond the annotations. No hidden side effects are revealed, but the annotations cover safety.

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 concise sentences: first states the function, second provides usage guidance. No filler, front-loaded with the primary purpose.

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?

With output schema present and strong annotations, the description covers purpose, usage scenarios, and return value shape (ranked docs with URLs and summaries). It is complete for a straightforward search tool.

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%; both query and limit are described in the schema. The description does not add significant parameter-level detail beyond the schema, as the schema already lists example query terms. Baseline 3 is appropriate.

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 clearly states it searches the public Spala agent-facing documentation index by query, which is a specific verb+resource. It also lists concrete topics (setup, OAuth, installer, MCP, pricing, etc.) that distinguishes it from sibling tools like spala_help or project management tools.

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?

Provides explicit usage context by listing question types that should trigger this tool ('Invoke for setup, OAuth, installer...'). It does not explicitly name alternative tools or state when not to use it, but the topic list gives clear guidance for an agent.

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