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

No annotations are provided, so the description carries the full burden of behavioral disclosure, and it does not state the date range covered, how much history is returned, pagination behavior, or what happens for a keyword with no data. Only the 'daily' granularity is communicated.

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 a single front-loaded fragment with zero redundancy, which is structurally clean, but it is under-specified rather than genuinely concise given the unanswered questions about output and parameters.

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 no output schema and no annotations, the description must explain returns and constraints, and it does not — no time window, no history length, no error behavior. For even a simple one-parameter tool this leaves meaningful gaps.

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% for the single required keywordId, and the description adds almost nothing — 'one tracked keyword' only vaguely hints that the ID comes from tracked keywords. There is no explanation of format, valid source, or behavior for an unknown ID.

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 phrase 'Daily rank history for one tracked keyword' names a specific resource (rank history), its granularity (daily), and its scope (one tracked keyword), so an agent knows what it retrieves. It lacks an explicit verb and never references sibling tools such as get_tracked_keywords, which keeps it from 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?

There is no guidance on when to call this tool, what prerequisites exist (e.g. obtaining a keywordId from get_tracked_keywords), or how it relates to the other keyword/app tools. The agent must infer everything from the one-line summary.

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