Twelvedata

Profile

profile

Read-onlyIdempotent

Twelve Data company profile for a stock symbol: name, sector, industry, employees, CEO, description, website, address, and exchange listing details.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`symbol`	Yes	Ticker/symbol. Stocks e.g. "AAPL", "MSFT"; forex "EUR/USD"; crypto "BTC/USD"; ETFs "SPY". Comma-separate for a batch (e.g. "AAPL,MSFT"). Market indices (SPX, N225, …) need a Grow-or-higher Twelve Data key passed via _apiKey — the shared key cannot quote them.
`exchange`	No	Optional exchange filter (e.g. "NASDAQ", "NYSE", "Binance").

Output Schema

TableJSON Schema

Name	Required	Description
`code`	No	Response code
`status`	No	Response status
`message`	No	Response message

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedSep 20, 2026

changedInput schema / properties / symbol / description

Previous value: -"Ticker/symbol. Stocks e.g. \"AAPL\", \"MSFT\"; forex \"EUR/USD\"; crypto \"BTC/USD\"; ETFs \"SPY\"; indices \"IXIC\". Comma-separate for a batch (e.g. \"AAPL,MSFT\")."New value: +"Ticker/symbol. Stocks e.g. \"AAPL\", \"MSFT\"; forex \"EUR/USD\"; crypto \"BTC/USD\"; ETFs \"SPY\". Comma-separate for a batch (e.g. \"AAPL,MSFT\"). Market indices (SPX, N225, …) need a Grow-or-higher Twelve Data key passed via _apiKey — the shared key cannot quote them."

Changed2 schema fields changedJun 24, 2026

addedInput schema / properties / exchange

Added value: +{
+  "description": "Optional exchange filter (e.g. \"NASDAQ\", \"NYSE\", \"Binance\").",
+  "type": "string"
+}

addedInput schema / properties / symbol

Added value: +{
+  "description": "Ticker/symbol. Stocks e.g. \"AAPL\", \"MSFT\"; forex \"EUR/USD\"; crypto \"BTC/USD\"; ETFs \"SPY\"; indices \"IXIC\". Comma-separate for a batch (e.g. \"AAPL,MSFT\").",
+  "type": "string"
+}

Changed2 schema fields changedMay 24, 2026

addedInput schema / examples

Added value: +[
+  {
+    "symbol": "AAPL"
+  }
+]

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "properties": {
+    "code": {
+      "description": "Response code",
+      "type": "number"
+    },
+    "message": {
+      "description": "Response message",
+      "type": "string"
+    },
+    "status": {
+      "description": "Response status",
+      "type": "string"
+    }
+  },
+  "type": "object"
+}

Changed1 schema field changedMay 24, 2026
- removedInput schema / additionalProperties
```
Removed value: -true
```
First observedMay 20, 2026

TDQS

B3.2/5.0

Behavior2/5

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

The annotations already carry the safety profile (readOnlyHint, idempotentHint, non-destructive), and the description adds little behavioral context beyond the source provider and an output-field list. It does not disclose rate limits, symbol-support limitations, or any response caveats, so most of the behavioral burden remains on the annotations.

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?

One sentence that leads with the purpose and then gives a compact, scannable list of returned fields. There is no filler, repetition of the title, or redundant explanation.

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?

For a two-parameter, read-only tool with a rich input schema, an output schema, and strong annotations, the description is sufficient for correct invocation. It could be more complete by clarifying the boundary with entity_profile/company_facts, but nothing essential to calling it correctly is missing.

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?

The description does not describe the parameters, but the input schema covers both symbol and exchange with 100% coverage, including batch semantics, asset classes, and the API-key caveat for indices. This meets the baseline where the schema carries the parameter burden.

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

Purpose4/5

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

The description states a specific operation and resource: retrieving a Twelve Data company profile for a stock symbol, and lists the fields returned (name, sector, industry, employees, CEO, etc.). It is clear and concrete, but it does not explicitly differentiate itself from overlapping siblings like entity_profile or company_facts, so it misses the top score.

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

Usage Guidelines2/5

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

There is no guidance on when to use this tool versus alternatives such as entity_profile, company_facts, quote, or stocks. The description says what it returns but not the decision context, exclusions, or conditions under which a sibling would be more appropriate.

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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