List the tables in the workbench database.

Call this first if you do not already know what data is available.

Describe columns, types and foreign keys for one table or all tables.

Always call this before writing SQL -- do not guess column names.

Run one read-only SELECT against the workbench database.

    Enforced by SQLite itself, not by string matching: the connection is
    opened read-only and an authorizer rejects every non-read action, so
    writes, DDL, PRAGMA and ATTACH all fail. Only one statement per call.

    Returns the column names, the rows, and whether the result was capped.
    

List calendar events in a date range, earliest first.

Use this to answer questions about what is on the calendar, and before scheduling anything, so you know what is already booked.

Create a calendar event.

    Refuses to double-book by default: if the slot overlaps an existing
    event the call fails and returns the conflicts, so you can pick another
    time (see find_free_slot) or retry with allow_conflict=true.
    

Find open slots of a given length within working hours.

    Returns the earliest candidates first, skipping times already in the
    past. Feed one of these straight into create_event.
    

Delete a calendar event by id. Confirm with the user before calling.

List issues in a repository, newest first.

Pull requests are filtered out -- GitHub returns them from the issues endpoint too, and they are almost never what you want here.

Fetch one issue in full, including its body.

Open a new issue. This posts publicly -- confirm with the user first.

Include enough context in the body that someone who was not part of this conversation can act on it.

Add a comment to an existing issue. Posts publicly -- confirm first.

Search issues across GitHub using its query syntax.

    Scope the search with a `repo:owner/name` qualifier unless the user
    genuinely wants results from the whole of GitHub.