Locks a display so that content changes such as send_html, send_url and clear_display are rejected until unlock_display is called. Use this when the user wants to protect a display from accidental content changes. The display continues showing its current content. Requires admin scope. Returns id...
Risk signalsHandles credentials or secrets (access_token) · Admin/system-level operation
Part of the Agentview server.
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AI agents use lock_display to create or modify resources in Agentview. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call lock_display repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Agentview.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"lock_display": {
"limits": [
{
"counter": "lock_display_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Agentview policy for all 55 tools.
These attack patterns abuse exactly the kind of access lock_display gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Locks a display so that content changes such as send_html, send_url and clear_display are rejected until unlock_display is called. Use this when the user wants to protect a display from accidental content changes. The display continues showing its current content. Requires admin scope. Returns id and locked (boolean true). To reverse this, use unlock_display.. It is categorised as a Write tool in the Agentview MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Agentview MCP server in PolicyLayer and add a rule for lock_display: 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 Agentview. Nothing to install.
lock_display 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 lock_display 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 lock_display. 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.
lock_display is provided by the Agentview MCP server (rafaelkocurek-nvob/agentview). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 55 Agentview tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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