Update non-secret datasource fields by UID. Omitted fields are preserved. For secrets, direct the user to the Grafana UI.
AI agents use update_datasource to create or update resources in Mcp Grafana Npx — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Grafana Npx environment.
| Parameter | Type | Required | Description |
|---|---|---|---|
uid | string | Yes | UID of the datasource to update |
url | string | — | Base URL |
name | string | — | Display name |
access | string | — | proxy or direct |
database | string | — | Database name |
jsonData | object | — | Non-secret plugin settings; replaces existing jsonData when set |
basicAuth | boolean | — | Enable basic auth |
isDefault | boolean | — | Make this the default datasource |
Parameters from the server's own tool schema.
The tool modifies datasource configuration in Grafana (a monitoring/observability platform) by updating existing fields. This is a reversible write operation—changes can be undone by updating fields again or restoring prior configuration. It does not delete, execute code, move funds, or cause irreversible damage.
From the tool's definition Tool name is 'update_datasource' and description states 'Update non-secret datasource fields by UID.' This indicates modification of existing datasource configuration data.
Risk signalsAccepts URL/endpoint input (url)
Attacks that exploit this kind of access
Update non-secret datasource fields by UID. Omitted fields are preserved. For secrets, direct the user to the Grafana UI. It is categorised as a Write tool in the Mcp Grafana Npx MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
update_datasource accepts 8 parameters: uid, url, name, access, database, jsonData, basicAuth, isDefault. Required: uid. The full parameter table on this page comes from the server's own tool schema.
Register the Mcp Grafana Npx MCP server in PolicyLayer and add a rule for update_datasource: 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 Grafana Npx. Nothing to install.
update_datasource 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 update_datasource 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 update_datasource. 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.
update_datasource is provided by the Mcp Grafana Npx MCP server (mcp-grafana-npx). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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