Restart multiple stopped sessions (max 3). Requires confirm=true.
AI agents invoke acp_bulk_restart_sessions to trigger actions in Ambient Code Platform MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
This tool executes commands that restart remote agent sessions in a Kubernetes environment. Although restarts are reversible (unlike deletions), they are Execute-class because they trigger external operations and resource state changes. The high severity reflects the blast radius: restarting multiple sessions could disrupt running workloads, consume resources, or interfere with active agent operations.
From the tool's definition Tool performs restart operations on multiple sessions ("Restart multiple stopped sessions"), which triggers external operations on Kubernetes-hosted Claude agents whose effects depend on which sessions are targeted.
Attacks that exploit this kind of access
Restart multiple stopped sessions (max 3). Requires confirm=true. It is categorised as a Execute tool in the Ambient Code Platform MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Ambient Code Platform MCP Server MCP server in PolicyLayer and add a rule for acp_bulk_restart_sessions: 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 Ambient Code Platform MCP Server. Nothing to install.
acp_bulk_restart_sessions is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the acp_bulk_restart_sessions 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 acp_bulk_restart_sessions. 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.
acp_bulk_restart_sessions is provided by the Ambient Code Platform MCP Server MCP server (jeremyeder/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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