schwab_price_history
A read tool on the Open Stocks MCP server.
This record as markdown: /tools/open-agent-tools-open-stocks-mcp/schwab-price-history.md
What schwab_price_history does on Open Stocks MCP
AI agents call schwab_price_history to retrieve information from Open Stocks MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why schwab_price_history is rated Low
Price history retrieval is a read-only operation that queries market data with no side effects. The tool does not modify accounts, execute trades, delete data, or move money. The 'price_history' suffix strongly suggests historical data retrieval rather than an action. While the description is empty (lowering confidence slightly), the tool name and server context are clear indicators of a benign Read operation.
From the tool's definition Tool name 'schwab_price_history' indicates retrieval of historical price data from Charles Schwab. No description provided, but the function name pattern and context (stock market data server) suggests a query-only operation that retrieves past pricing…
Attacks that exploit this kind of access
The rule that runs schwab_price_history safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Open Stocks MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For schwab_price_history, this is the rule to start with:
schwab_price_history is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Open Stocks MCP, apply this rule, and every schwab_price_history call is checked against it from then on.
Questions about schwab_price_history
schwab_price_history is a read tool on the Open Stocks MCP server. It is categorised as a Read tool in the Open Stocks MCP MCP Server, which means it retrieves data without modifying state.
Register the Open Stocks MCP server in PolicyLayer and add a rule for schwab_price_history: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Open Stocks MCP. Nothing to install.
schwab_price_history is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the schwab_price_history rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for schwab_price_history. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
schwab_price_history is provided by the Open Stocks MCP server (open-agent-tools/open-stocks-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
More on Open Stocks, and thousands of servers like it.
This server
Across the catalogue