nexql-tools 0.4.1

MCP tool registry, JSON schemas, executors
Documentation 
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// SPDX-License-Identifier: GPL-3.0-only
// Copyright (C) 2026 NexQL-OSS Team

use nexql_conn::format_postgres_error;
use thiserror::Error;

#[derive(Debug, Error)]
pub enum ToolError {
    #[error("unknown tool: {0}")]
    Unknown(String),

    #[error("invalid arguments: {0}")]
    InvalidArgs(String),

    #[error("tool execution failed: {0}")]
    Execution(String),

    #[error(transparent)]
    Conn(#[from] nexql_conn::ConnError),

    #[error(transparent)]
    Policy(#[from] nexql_policy::PolicyError),

    #[error(transparent)]
    Index(#[from] nexql_index::IndexError),

    #[error("postgres error: {}", format_postgres_error(.0))]
    Postgres(#[from] tokio_postgres::Error),
}