Fill/replace value in an input, textarea, select, OR contenteditable (rich text). Handles React controlled inputs, ProseMirror, Draft.js, and Google Closure editors automatically. Use for SETTING a value (replaces existing). For code editors (Monaco/CodeMirror/Ace), use safari_replace_editor inst...
Part of the Safari server.
Free to start. No card required.
AI agents use safari_fill 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_fill 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_fill": {
"limits": [
{
"counter": "safari_fill_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_fill 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.
Fill/replace value in an input, textarea, select, OR contenteditable (rich text). Handles React controlled inputs, ProseMirror, Draft.js, and Google Closure editors automatically. Use for SETTING a value (replaces existing). For code editors (Monaco/CodeMirror/Ace), use safari_replace_editor instead. For character-by-character typing in search boxes, use safari_type_text. IMPORTANT: When using ref, always take a FRESH safari_snapshot first — refs expire after each new snapshot (prefix changes: 5_xx → 6_xx).. 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_fill: 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_fill 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_fill 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_fill. 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_fill 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.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.