Select an option from a dropdown by its text. Args: index (int): The index of the dropdown element. text (str): The exact text of the option to select. Returns: str: A message confirming the option was selected.
AI agents invoke select_dropdown_option to trigger actions in Mcp Browser Use. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
Selecting a dropdown option is a browser action that modifies UI state and can trigger downstream effects (form submissions, dynamic page changes, navigation). It falls under Execute as it performs a browser action whose consequences depend on the target page and arguments provided.
From the tool's definition 'Select an option from a dropdown by its text' — triggers a browser interaction (selecting a dropdown option) that may cause external operations depending on the page context (e.g., form changes, navigation, filtering).
Documented attack patterns abuse exactly the kind of access select_dropdown_option gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Browser Use, and nothing reaches the server without passing your rules. This is the rule we recommend for select_dropdown_option:
{
"version": "1",
"default": "deny",
"tools": {
"select_dropdown_option": {
"limits": [
{
"counter": "select_dropdown_option_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}select_dropdown_option stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Select an option from a dropdown by its text. Args: index (int): The index of the dropdown element. text (str): The exact text of the option to select. Returns: str: A message confirming the option was selected. It is categorised as a Execute tool in the Mcp Browser Use MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Mcp Browser Use MCP server in PolicyLayer and add a rule for select_dropdown_option: 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 Mcp Browser Use. Nothing to install.
select_dropdown_option is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the select_dropdown_option 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 select_dropdown_option. 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.
select_dropdown_option is provided by the Mcp Browser Use MCP server (vinayak-mehta/mcp-browser-use). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 19 Mcp Browser Use tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
19 Mcp Browser Use tools catalogued and risk-classified — across an index of 42,500+ MCP servers.