Crawlora MCP

yahoo_finance_ticker_funds

Read-only

Fetch ETF or mutual-fund profile, holdings, and allocation data for one Yahoo Finance symbol. Use yahoo_finance_ticker_holders for ownership-holder data 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_funds"
  }
}

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

A4.2/5.0

Behavior3/5

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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds only the 'one symbol' scoping detail; it says nothing about data freshness, latency, or coverage limits for funds that lack ETF/mutual-fund data.

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?

Two tight sentences, zero filler, with the positive scope front-loaded before the disambiguation clause.

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

Completeness4/5

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

Output schema exists, so return values need not be described, and annotations carry the safety profile. The definition is essentially complete for a one-parameter read tool, with only minor behavioral detail (data freshness/edge cases) left unstated.

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 there is a single parameter, so the schema already documents symbol fully. The description's 'for one Yahoo Finance symbol' merely restates that, adding no format or lookup guidance beyond what is structured.

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) plus the exact resource (ETF or mutual-fund profile, holdings, allocation) scoped to one Yahoo Finance symbol. It also distinguishes itself from the closely named sibling yahoo_finance_ticker_holders, so an agent can pick correctly without opening schemas.

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

Usage Guidelines5/5

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

Explicitly routes the agent: use this for fund profile/holdings/allocation, and use yahoo_finance_ticker_holders for ownership-holder data instead. That is a named alternative plus the condition that selects it.

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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