Function call_operation 

pub async fn call_operation(
    endpoint: &EndpointRecord,
    config: &Config,
    auth_manager: &mut AuthManager,
    operation_id: &str,
    args: Value,
    request_override: Option<&RequestCredentials>,
) -> Result<Value>

Validates arguments against the input schema, injects the active auth strategy’s credentials, executes the live HTTP request, and checks the response against the output schema before returning it — PRD §1.5’s call pipeline (architecture.md’s 4-step call pipeline).

An output-schema mismatch is only logged, not raised: real-world OpenAPI specs (e.g. Atlassian’s published Jira Data Center spec) are frequently wrong about response shape — declaring a single object where the API actually returns an array, or an overly narrow additionalProperties for a free-form bag of fields — and rejecting an otherwise-successful call over a documentation bug would deny the caller real data it already has in hand. Input validation still hard-fails: those arguments are under the caller’s control, not the upstream API’s.

Takes an already-looked-up EndpointRecord rather than a Connection and an operation_id to look up itself: rusqlite::Connection isn’t Sync, so a &Connection held across this function’s .await points (the HTTP call) would make the caller’s future non-Send — a hard requirement for #[tool] methods (Story R6). Callers look the endpoint up (a synchronous, Connection-scoped step) before calling this function, not inside it.