Crawlora MCP

yahoo_finance_ticker_sustainability

Read-only

Fetch Yahoo Finance ESG and sustainability data for one symbol; a recognized symbol without ESG data returns an empty esgScores object. Use yahoo_finance_ticker_valuation for valuation measures instead.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "symbol": "<symbol>"
    },
    "name": "yahoo_finance_ticker_sustainability"
  }
}

Input Schema

Name	Required	Description	Default
`symbol`	Yes	Yahoo Finance symbol such as AAPL.

Output Schema

Name	Required	Description	Default
`data`	Yes	The tool result payload (shape varies per tool; see each tool's docs resource).

Schema Changelog

Changes observed during successful MCP inspections.

First observedOct 5, 2026

TDQS

A4.3/5.0

Behavior4/5

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

Annotations already declare readOnlyHint and openWorldHint, so the safety profile is covered. The description adds genuinely useful operational context beyond structured fields: a recognized symbol lacking ESG data returns an empty esgScores object, telling the agent how to interpret an empty result.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

A single sentence with a semicolon clause and a routing sentence, front-loaded with the core action and with no wasted words.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple one-parameter read tool with an output schema and annotation-covered safety profile, nothing needed for correct invocation is missing; the empty-result caveat and sibling routing round it out.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% and the single 'symbol' parameter is fully documented in the schema, so the baseline is 3. The phrase 'for one symbol' reinforces the singular cardinality but adds no syntax or format detail beyond the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb ('Fetch'), resource ('Yahoo Finance ESG and sustainability data'), and scope ('one symbol'), and explicitly names the sibling it is not (yahoo_finance_ticker_valuation). An agent can distinguish it from the other Yahoo Finance ticker tools without opening any schema.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Explicitly routes valuation requests to the alternative tool, which covers the main confusion case among the many yahoo_finance_ticker_* siblings. It does not enumerate exclusions beyond that, but the use case is clear from the purpose.

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

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