util_arr_compact
Drop null/empty values from a list
This record as markdown: /tools/io-github-davidmosiah-delx-mcp-a2a/util-arr-compact.md
What util_arr_compact does on Delx Mcp A2a
AI agents call util_arr_compact to permanently remove resources in Delx Mcp A2a, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
| Parameter | Type | Required | Description |
|---|---|---|---|
items | array | Yes | Input field: items. |
Parameters from the server's own tool schema.
Why util_arr_compact is rated Critical
An AI agent that decides to call util_arr_compact doesn't hesitate, doesn't double-check, and doesn't stop at one. Whatever it removes from Delx Mcp A2a is gone. There is no undo for destructive operations.
Attacks that exploit this kind of access
The rule that runs util_arr_compact safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Delx Mcp A2a, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For util_arr_compact, this is the rule to start with:
util_arr_compact is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.
The button opens the PolicyLayer dashboard: create your workspace, connect Delx Mcp A2a, apply this rule, and every util_arr_compact call is checked against it from then on.
Questions about util_arr_compact
Drop null/empty values from a list. It is categorised as a Destructive tool in the Delx Mcp A2a MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
util_arr_compact accepts 1 parameter: items. Required: items. The full parameter table on this page comes from the server's own tool schema.
Register the Delx Mcp A2a MCP server in PolicyLayer and add a rule for util_arr_compact: 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 Delx Mcp A2a. Nothing to install.
util_arr_compact 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 util_arr_compact 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 util_arr_compact. 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.
util_arr_compact is provided by the Delx Mcp A2a MCP server (https://api.delx.ai/v1/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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