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

Annotations only declare readOnlyHint=true, so the description carries the rest — it discloses that a research id returns that research's latest report, that markdown is the default output mode, and that json yields a fixed key set. It does not mention error behavior for an unfinished scan, which keeps 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?

Purpose is front-loaded correctly, but the middle is a single sprawling sentence enumerating every report subsection (economics, SEO, ASO, names, landing, channels...). Much of that detail is useful for a missing output schema, yet it is delivered densely enough that the format instruction nearly gets lost at the end.

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?

There is no output schema, so the description must describe returns — and it does so exhaustively, mapping markdown content and json keys section by section, plus the id/format semantics. With readOnlyHint covering the safety profile, an agent has everything needed to call this 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 100%, so the baseline is 3, but the description adds real meaning: it clarifies that 'id' accepts either a research id (latest report returned) or a report id, and it lists the ten json keys the format switch produces, which the schema's bare enum does not convey.

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 ('returns the final niche report of a finished scan') and enumerates the exact contents it returns, so an agent can distinguish it from get_research or get_project without opening a schema. The parenthetical '(or the report research itself)' further pins the scope.

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 (call this to read a finished scan's report) and it gives one actionable instruction — pass format "json" for structured data. However, it never states when to prefer this over sibling retrieval tools like get_research, nor any prerequisite such as the scan having finished.

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