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

Annotations already declare it as a safe read-only operation. The description adds useful context beyond annotations: no live FX rate needed, pip size conventions (0.0001 vs 0.01), and the conditions when the live variant is required. However, it does not document error cases or limitations (e.g., unsupported pairs).

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?

Information is front-loaded and reasonably efficient, but slightly verbose with parenthetical explanations and a meta-comment about verification. Every sentence contributes, though some could be tightened.

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?

Complete for a simple 2-parameter read-only calculator: covers purpose, the key alternative, and output fields. With no output schema, it lists the returned fields, which is helpful. Minor gap: no explicit handling of invalid pair formats or edge cases.

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%, so the schema already documents both parameters. The description provides example output naming and the pip size convention, but doesn't add format details for the parameters beyond what the schema says. 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?

States a specific verb+resource: the value of 1 pip for a forex pair and position size, clearly denominated. Distinguishes itself from the live sibling and scopes the calculation to the pair's own quote currency.

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?

Explicitly names the alternative (workflow.run_forex_pip_value_live) and the condition that selects it (account currency differs from quote currency). Also gives a natural-language usage trigger.

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