向 Gemini 发送文本消息并等待回答完成（不提取图片，纯文本交互）。 【长耗时工具】同步阻塞等待 Gemini 回复完毕才返回。典型耗时 10~60 秒，必须等到最终结果再回传用户。 【返回值】直接返回 Gemini 的回复文本内容，无需再调用 gemini_get_latest_text_response。
AI agents invoke gemini_send_message to trigger actions in Gemini Skill. 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.
This tool triggers an external operation — sending a message to the Gemini web interface via Chrome DevTools Protocol and waiting for a response. It is not a simple read/query; it performs an action on an external system (browser-controlled Gemini session), making it Execute. Misuse could drive unintended AI interactions or consume external resources, but blast radius is moderate.
From the tool's definition 向 Gemini 发送文本消息并等待回答完成 (sends a text message to Gemini and waits for the reply to complete); controls Gemini web interface via CDP
Documented attack patterns abuse exactly the kind of access gemini_send_message gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Gemini Skill, and nothing reaches the server without passing your rules. This is the rule we recommend for gemini_send_message:
{
"version": "1",
"default": "deny",
"tools": {
"gemini_send_message": {
"limits": [
{
"counter": "gemini_send_message_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}gemini_send_message 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.
向 Gemini 发送文本消息并等待回答完成（不提取图片，纯文本交互）。 【长耗时工具】同步阻塞等待 Gemini 回复完毕才返回。典型耗时 10~60 秒，必须等到最终结果再回传用户。 【返回值】直接返回 Gemini 的回复文本内容，无需再调用 gemini_get_latest_text_response。. It is categorised as a Execute tool in the Gemini Skill MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Gemini Skill MCP server in PolicyLayer and add a rule for gemini_send_message: 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 Gemini Skill. Nothing to install.
gemini_send_message 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 gemini_send_message 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 gemini_send_message. 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.
gemini_send_message is provided by the Gemini Skill MCP server (wjz-p/gemini-skill). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 21 Gemini Skill tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
21 Gemini Skill tools catalogued and risk-classified — across an index of 42,500+ MCP servers.