Get historical CHF exchange rates for a currency from the Swiss National Bank (SNB). Returns monthly average rates with optional date filtering. Without date range, returns the most recent 90 months.
AI agents call get_exchange_rate_history to retrieve information from Mcp Swiss without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns historical exchange rate data from the Swiss National Bank without modifying, deleting, or executing any operations. It is a pure read operation with no destructive, financial, or code execution capability. Low severity because the data is historical public information with no immediate impact on system state or financial transactions.
From the tool's definition Tool name 'get_exchange_rate_history' and description 'Get historical CHF exchange rates' and 'Returns monthly average rates' indicate data retrieval with no side effects.
Attacks that exploit this kind of access
Get historical CHF exchange rates for a currency from the Swiss National Bank (SNB). Returns monthly average rates with optional date filtering. Without date range, returns the most recent 90 months. It is categorised as a Read tool in the Mcp Swiss MCP Server, which means it retrieves data without modifying state.
Register the Mcp Swiss MCP server in PolicyLayer and add a rule for get_exchange_rate_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 Mcp Swiss. Nothing to install.
get_exchange_rate_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 get_exchange_rate_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 get_exchange_rate_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.
get_exchange_rate_history is provided by the Mcp Swiss MCP server (mcp-swiss). 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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