QuantOracle

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

Annotations already declare readOnlyHint=true and idempotentHint=true, establishing this is a safe, deterministic calculation. The description adds value by disclosing the 'forward projections' behavioral trait, indicating the tool can extrapolate future values, not just calculate historical CAGR. However, it fails to describe the projection scope (how many years forward) or return format.

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?

Extremely concise single sentence. The phrase 'Compound Annual Growth Rate' is slightly redundant with the tool name and annotation title, but 'with optional forward projections' provides essential distinctiveness. No wasted words, though additional sentences covering usage guidelines would improve utility.

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?

For a simple four-parameter calculation tool with complete schema coverage and comprehensive annotations, the description is minimally adequate. However, given the absence of an output schema, it should ideally describe what the tool returns (e.g., the growth rate percentage and projection values) and explain the projection behavior more explicitly.

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?

Input schema has 100% description coverage, clearly documenting all four parameters including the optional boolean flag. The description mentions 'optional forward projections' which aligns with the include_projections parameter, but adds no semantic detail beyond what the schema already provides (e.g., no guidance on projection horizon or value interpretation).

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 identifies the specific calculation performed (Compound Annual Growth Rate) and distinguishes it from sibling tools (technical indicators, options pricing, risk calculations) by specifying it is a TVM calculation. It also highlights the optional forward projections feature. Lacks an explicit verb ('Calculate'), relying on implied action.

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 no guidance on when to use this tool versus alternatives, nor when to enable the optional projections parameter. No mention of input constraints (e.g., start_value must be less than end_value for positive growth) or prerequisites.

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