Retrieve Yahoo Finance earnings modules for a stock symbol to check quarterly results, EPS, and revenue reports.
Yahoo Finance earnings. Returns Yahoo Finance earnings modules for a symbol.
| Name | Required | Description | Default |
|---|---|---|---|
| symbol | Yes | Yahoo Finance symbol such as AAPL |
Changes observed during successful MCP inspections.
v1.0.0Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description should disclose behavioral traits. It only states it returns data, with no mention of idempotency, auth needs, rate limits, or side effects. The return is vaguely described as 'modules'.
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?
Short but somewhat redundant: both sentences essentially say the same thing. Could be more efficient by removing the first sentence or merging.
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 a single required parameter and no output schema, the description is minimally complete but fails to explain what 'earnings modules' are or what the output contains, leaving ambiguity.
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% with a clear description for 'symbol'. The description adds no extra meaning beyond the schema, so 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?
The description states it returns Yahoo Finance earnings modules for a symbol, which gives a verb and resource. However, 'earnings modules' is vague, and the description does not distinguish it from sibling tools like yahoo_finance_ticker_earnings_dates or yahoo_finance_ticker_calendar.
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 on when to use this tool versus alternatives among the many yahoo_finance_ticker_* siblings. It does not mention prerequisites, exclusions, or context.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.