AI agents use update_access_group_project to create or update resources in Vercel MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Vercel MCP Server environment.
The tool modifies access group project settings, which is a Write operation (reversible data modification). While it affects access control, it does not delete data (Destructive), execute arbitrary code (Execute), move money (Financial), or read-only retrieve data (Read). The severity is medium because misconfiguration could grant unintended access or restrict legitimate team members, but the change is reversible.
From the tool's definition Tool name 'update_access_group_project' and description 'Update an access group project' indicate modification of existing access control configurations. This is a reversible change operation affecting project access settings.
Documented attack patterns abuse exactly the kind of access update_access_group_project gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Vercel MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for update_access_group_project:
{
"version": "1",
"default": "deny",
"tools": {
"update_access_group_project": {
"limits": [
{
"counter": "update_access_group_project_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}update_access_group_project 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.
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Update an access group project. It is categorised as a Write tool in the Vercel MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Vercel MCP Server MCP server in PolicyLayer and add a rule for update_access_group_project: 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 Vercel MCP Server. Nothing to install.
update_access_group_project 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_access_group_project 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_access_group_project. 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_access_group_project is provided by the Vercel MCP Server MCP server (quegenx/vercel-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 154 Vercel MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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154 Vercel MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.