trange

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. 'Fetch true range' implies a read-only operation but doesn't specify data sources, rate limits, authentication needs, or output format. It fails to describe any behavioral traits beyond the basic action, making it inadequate for a tool with parameters.

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 extremely concise with just two words, 'Fetch true range', which is front-loaded and wastes no space. However, this brevity comes at the cost of clarity and completeness, but it meets the criteria for conciseness.

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?

Given the complexity of a financial data tool with 4 parameters, 0% schema coverage, no annotations, and no output schema, the description is completely inadequate. It doesn't explain what 'true range' means, how to use the parameters, or what the tool returns, failing to provide necessary context for effective use.

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%, meaning none of the 4 parameters (symbol, interval, month, datatype) are documented in the schema. The description adds no information about these parameters, such as their purposes, formats, or examples, leaving them completely unexplained.

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 'Fetch true range' restates the tool name 'trange' with minimal elaboration, making it tautological. It specifies a verb ('fetch') and a resource ('true range'), but 'true range' is ambiguous without context, and it doesn't distinguish this tool from siblings like 'atr' (Average True Range) or other financial indicators in the list.

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?

No guidance is provided on when to use this tool versus alternatives. Given siblings like 'atr' (Average True Range) and other technical indicators, the description lacks any context, prerequisites, or exclusions, leaving the agent without direction for selection.

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