toolError
The target returned a result with isError: true (graceful rejection).
How to use it
Project documentation lists toolError for the Mcprobe MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), then check which tools your installed version makes available. Tool availability can depend on configuration and credentials. A server handshake does not verify this tool’s behavior. See the full listing for setup details.
Install Mcprobe
node /absolute/path/to/mcprobe/dist/index.jsOther tools in Mcprobe (21)
append a sentinel key to the valid args.
The target returned a result with isError: false. For a malformed case this is silentlyAccepted: true; for a valid case with no usable content it is emptySuccess: true, and a valid success that breaks the tool's declared outputSchema is outputSchemaViolation: true.
warning
warning
Open a connection to a target.
(optional) Close one connection (by id) or every connection.
Generate valid + malformed inputs per tool, call each, classify the outcome. Skips destructive tools by default.
Run the 12 lint rules over the target's cached tool summaries.
(optional) Enumerate the target's tools.
Run lint (and fuzz when requested), score, render Markdown.
The call rejected or the transport closed.
error
info
warning
warning
error
error
info
warning
warning
warning