util_truncate_middle
Truncate long text in the middle with an ellipsis
This record as markdown: /tools/io-github-davidmosiah-delx-mcp-server/util-truncate-middle.md
What util_truncate_middle does on Delx MCP Server
AI agents call util_truncate_middle to permanently remove resources in Delx MCP Server, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
| Parameter | Type | Required | Description |
|---|---|---|---|
text | string | Yes | Input field: text. |
max_chars | integer | Yes | Input field: max chars. |
Parameters from the server's own tool schema.
Why util_truncate_middle is rated Critical
An AI agent that decides to call util_truncate_middle doesn't hesitate, doesn't double-check, and doesn't stop at one. Whatever it removes from Delx MCP Server is gone. There is no undo for destructive operations.
Attacks that exploit this kind of access
The rule that runs util_truncate_middle safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Delx MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For util_truncate_middle, this is the rule to start with:
util_truncate_middle 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 Server, apply this rule, and every util_truncate_middle call is checked against it from then on.
Questions about util_truncate_middle
Truncate long text in the middle with an ellipsis. It is categorised as a Destructive tool in the Delx MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
util_truncate_middle accepts 2 parameters: text, max_chars. Required: text, max_chars. The full parameter table on this page comes from the server's own tool schema.
Register the Delx MCP Server MCP server in PolicyLayer and add a rule for util_truncate_middle: 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 Server. Nothing to install.
util_truncate_middle 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_truncate_middle 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_truncate_middle. 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_truncate_middle is provided by the Delx MCP Server MCP server (delx-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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