adb_screencap
Take a screenshot and save to local filesystem. Returns the file path.
This record as markdown: /tools/io-github-fullread-deepadb/adb-screencap.md
What adb_screencap does on Deepadb
AI agents call adb_screencap to retrieve information from Deepadb without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why adb_screencap is rated Low
The tool captures the current screen state (a read/observe operation) and saves it locally. While it writes a file to the filesystem, the primary purpose is data retrieval/observation with no destructive or external side effects. The main risk is privacy (screen contents may be sensitive), but the action is reversible and non-destructive.
From the tool's definition Take a screenshot and save to local filesystem. Returns the file path.
Attacks that exploit this kind of access
The rule that runs adb_screencap safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Deepadb, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For adb_screencap, this is the rule to start with:
adb_screencap is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Deepadb, apply this rule, and every adb_screencap call is checked against it from then on.
Questions about adb_screencap
Take a screenshot and save to local filesystem. Returns the file path. It is categorised as a Read tool in the Deepadb MCP Server, which means it retrieves data without modifying state.
Register the Deepadb MCP server in PolicyLayer and add a rule for adb_screencap: 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 Deepadb. Nothing to install.
adb_screencap is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the adb_screencap 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 adb_screencap. 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.
adb_screencap is provided by the Deepadb MCP server (deepadb). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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