Updates a variable in a project
AI agents use update_variable to create or update resources in Keyshade — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Keyshade environment.
This tool modifies existing variable values reversibly. It is not destructive (no deletion/permanent loss), not financial (no money movement), and not execute (no code/command invocation).
From the tool's definition Tool name is "update_variable" and description states it "Updates a variable in a project" — a modification operation on data within a secrets management system.
Documented attack patterns abuse exactly the kind of access update_variable gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Keyshade, and nothing reaches the server without passing your rules. This is the rule we recommend for update_variable:
{
"version": "1",
"default": "deny",
"tools": {
"update_variable": {
"limits": [
{
"counter": "update_variable_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}update_variable stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Updates a variable in a project. It is categorised as a Write tool in the Keyshade MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Keyshade MCP server in PolicyLayer and add a rule for update_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 Keyshade. Nothing to install.
update_variable is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the update_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 update_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.
update_variable is provided by the Keyshade MCP server (keyshade-xyz/keyshade-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Keyshade, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
44 Keyshade tools catalogued and risk-classified — across an index of 43,000+ MCP servers.