Get one 1Password Environment variable by exact name, with the value redacted. ${SCRIPT_RUNNER_SECRET_HINT}
AI agents call environment_get_variable to retrieve information from Mcp 1password without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves environment variable metadata with the actual secret value redacted by default, making it a safe read operation. While it accesses sensitive information sources, the redaction mechanism mitigates exposure risk. The tool does not create, modify, delete, execute code, or handle financial transactions—it only queries and returns (partially obscured) data.
From the tool's definition Tool description states 'Get one 1Password Environment variable by exact name, with the value redacted.' The verb 'Get' and the redaction of the value indicate this is a read operation that retrieves data without modification.
Attacks that exploit this kind of access
Get one 1Password Environment variable by exact name, with the value redacted. ${SCRIPT_RUNNER_SECRET_HINT}. It is categorised as a Read tool in the Mcp 1password MCP Server, which means it retrieves data without modifying state.
Register the Mcp 1password MCP server in PolicyLayer and add a rule for environment_get_variable: 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 1password. Nothing to install.
environment_get_variable 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 environment_get_variable 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 environment_get_variable. 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.
environment_get_variable is provided by the Mcp 1password MCP server (kefapps/onepassword-mcp-codex). 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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