AI agents call schwab_get_dividends_by_symbol to retrieve information from Open Stocks MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves historical or current dividend information for a given stock symbol. Dividend queries are read-only operations that do not modify account state, execute trades, or cause financial transactions. Even if an AI agent misuses this tool by querying many symbols, the blast radius is limited to data exposure.
From the tool's definition Tool name 'schwab_get_dividends_by_symbol' indicates a query/retrieval operation. No description provided, but the naming pattern matches sibling tools like 'add_to_watchlist' and 'account_details' which are clearly read operations.
Documented attack patterns abuse exactly the kind of access schwab_get_dividends_by_symbol gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Open Stocks MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for schwab_get_dividends_by_symbol:
{
"version": "1",
"default": "deny",
"tools": {
"schwab_get_dividends_by_symbol": {}
}
}schwab_get_dividends_by_symbol is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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schwab_get_dividends_by_symbol. 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_get_dividends_by_symbol: 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_get_dividends_by_symbol 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_get_dividends_by_symbol 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_get_dividends_by_symbol. 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_get_dividends_by_symbol 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.
Start from Open Stocks MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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152 Open Stocks MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.