Struct PreMcpToolCallOutput 

pub struct PreMcpToolCallOutput {
    pub meta_to_use: Option<Value>,
}

Output for the preMcpToolCall hook.

meta_to_use has tri-state semantics:

• None: field is absent in JSON, meaning preserve existing _meta
• Some(Value::Null): serialized as JSON null, meaning omit _meta
• Some(Value::Object(...)): serialized as JSON object, meaning replace _meta

Fields

meta_to_use: Option<Value>

Hook-controlled metadata for the outgoing MCP request.

Trait Implementations

impl Clone for PreMcpToolCallOutput

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for PreMcpToolCallOutput

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for PreMcpToolCallOutput

fn default() -> Self

Returns the “default value” for a type.

impl Serialize for PreMcpToolCallOutput

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.