AI agents call get_transaction to retrieve information from Schwab without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves historical transaction information from a brokerage account without any side effects. It performs a simple query operation to fetch data by identifier. While the server context involves financial accounts, this particular tool only reads transaction details and does not move money, create orders, or modify any state.
From the tool's definition Tool name is 'get_transaction' and description states 'Get details for a single transaction by ID' — this is a retrieval operation with no modification or execution capability.
Attacks that exploit this kind of access
Get details for a single transaction by ID. It is categorised as a Read tool in the Schwab MCP Server, which means it retrieves data without modifying state.
Register the Schwab MCP server in PolicyLayer and add a rule for get_transaction: 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 Schwab. Nothing to install.
get_transaction 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 get_transaction 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 get_transaction. 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.
get_transaction is provided by the Schwab MCP server (k1xme/schwab-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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