Class McpToolMetadataKeys

java.lang.Object

dev.langchain4j.mcp.client.McpToolMetadataKeys

public class McpToolMetadataKeys
extends Object

Constants for MCP tool annotation keys, as defined in the MCP specification. These constants are used as keys in the metadata map inside ToolSpecification.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	DESTRUCTIVE_HINT	Indicates whether the tool is destructive.
static final String	IDEMPOTENT_HINT	Indicates whether the tool is idempotent.
static final String	OPEN_WORLD_HINT	Indicates whether the tool may interact with the open world (like internet resources).
static final String	READ_ONLY_HINT	Indicates whether the tool is read-only.
static final String	TITLE	A human-readable title for the tool retrieved from the Tool definition directly, as opposed to the title that is stored in the annotations.
static final String	TITLE_ANNOTATION	A human-readable title for the tool as retrieved from the tool annotations, as opposed to the title that is stored in the Tool definition directly.

Constructor Summary

Constructors

Constructor	Description
McpToolMetadataKeys()

Method Summary

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

TITLE_ANNOTATION

public static final String TITLE_ANNOTATION

A human-readable title for the tool as retrieved from the tool annotations, as opposed to the title that is stored in the Tool definition directly. See schema.json Value type: String

See Also:

• Constant Field Values

TITLE

public static final String TITLE

A human-readable title for the tool retrieved from the Tool definition directly, as opposed to the title that is stored in the annotations. See schema.json Value type: String

See Also:

• Constant Field Values

READ_ONLY_HINT

public static final String READ_ONLY_HINT

Indicates whether the tool is read-only. Value type: boolean

See Also:

• Constant Field Values

DESTRUCTIVE_HINT

public static final String DESTRUCTIVE_HINT

Indicates whether the tool is destructive. Value type: boolean

See Also:

• Constant Field Values

IDEMPOTENT_HINT

public static final String IDEMPOTENT_HINT

Indicates whether the tool is idempotent. Value type: boolean

See Also:

• Constant Field Values

OPEN_WORLD_HINT

public static final String OPEN_WORLD_HINT

Indicates whether the tool may interact with the open world (like internet resources). Value type: boolean

See Also:

• Constant Field Values

Constructor Details

McpToolMetadataKeys

public McpToolMetadataKeys()