batch_array_remove
AI agents call batch_array_remove to permanently remove resources in Frontmatter MCP — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
The name 'batch_array_remove' strongly implies removal/deletion of array elements in frontmatter metadata across multiple documents. 'Remove' typically indicates a destructive, potentially irreversible deletion operation, and 'batch' increases the blast radius. However, the empty description lowers confidence — it could be a reversible write operation.
From the tool's definition Tool name: batch_array_remove; description is empty
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
batch_array_remove. It is categorised as a Destructive tool in the Frontmatter MCP MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Frontmatter MCP server in PolicyLayer and add a rule for batch_array_remove: 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 Frontmatter MCP. Nothing to install.
batch_array_remove is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the batch_array_remove 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 batch_array_remove. 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.
batch_array_remove is provided by the Frontmatter MCP server (kzmshx/frontmatter-mcp). 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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