Hot-reload the Safari MCP Bridge extension — forces it to reload its own code from disk without requiring manual Safari Preferences → Extensions → toggle. Use after editing extension/background.js or extension/content.js in the safari-mcp repo. The extension briefly disconnects during reload and ...
Part of the Safari server.
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AI agents use safari_reload_extension to create or modify resources in Safari. 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 safari_reload_extension 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 Safari.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"safari_reload_extension": {
"limits": [
{
"counter": "safari_reload_extension_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Safari policy for all 91 tools.
These attack patterns abuse exactly the kind of access safari_reload_extension 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.
Hot-reload the Safari MCP Bridge extension — forces it to reload its own code from disk without requiring manual Safari Preferences → Extensions → toggle. Use after editing extension/background.js or extension/content.js in the safari-mcp repo. The extension briefly disconnects during reload and auto-reconnects within ~2 seconds. NOTE: this tool itself requires the extension version already installed to support the. It is categorised as a Write tool in the Safari MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Safari MCP server in PolicyLayer and add a rule for safari_reload_extension: 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 Safari. Nothing to install.
safari_reload_extension 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 safari_reload_extension 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 safari_reload_extension. 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.
safari_reload_extension is provided by the Safari MCP server (safari-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 91 Safari tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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