Get the access token for the user.
AI agents call get_access_token to retrieve information from Zerodha without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
While this is technically a Read operation (retrieving data without modifying state), the specific nature of the data—an access token—elevates severity beyond typical read operations. An access token grants broad authority over the user's trading account, including order placement and financial transactions.
From the tool's definition Tool name 'get_access_token' and description 'Get the access token for the user' indicate retrieval of authentication credentials.
Documented attack patterns abuse exactly the kind of access get_access_token gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Zerodha, and nothing reaches the server without passing your rules. This is the rule we recommend for get_access_token:
{
"version": "1",
"default": "deny",
"tools": {
"get_access_token": {}
}
}get_access_token is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get the access token for the user. It is categorised as a Read tool in the Zerodha MCP Server, which means it retrieves data without modifying state.
Register the Zerodha MCP server in PolicyLayer and add a rule for get_access_token: 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 Zerodha. Nothing to install.
get_access_token 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_access_token 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_access_token. 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_access_token is provided by the Zerodha MCP server (mtwn105/zerodha-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Zerodha, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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12 Zerodha tools catalogued and risk-classified — across an index of 43,000+ MCP servers.