Tool Calling and Plugins for Multi-App Routing Unified AI

What the data for this category looks like

Multi-app routing data comes from three sources: routing match requests initiated by users, responses from mounted sub-app interfaces, and records of bound plugin invocations. The system generates this data in real time each time a routing match triggers. There is no fixed update cycle.

The document uses standardized invocation logs and routing match results. The structure includes these fields: route_match_id (string, unique identifier for a single invocation) matched_sub_app_id (string, unique identifier for the matched sub-app) invoke_params (JSON object, contains user input and plugin injection parameters) plugin_return_data (JSON object, return results from bound plugins) context_attach (JSON object, associated contextual session data)

All fields use standard JSON format. They have no fixed physical units, and only carry business identifiers and business data.

What constraints these characteristics impose on tool calling and plugins

Real-time generated JSON data for multi-app routing requires strict adherence to preset parameter formats for tool calls and plugins. Non-compliance triggers invalid requests.

The data includes the matched_sub_app_id and context_attach fields. Plugins must pass the matched sub-app identifier and contextual session data accurately during invocation. Missing or incorrect data prevents correct routing to the target sub-app, and blocks reuse of session context.

Plugin return data must align with the input specifications of the target sub-app. If plugin return fields do not match the fields accepted by the sub-app, the sub-app cannot parse the returned data.

Each invocation generates data in real time. Tool call timeout settings must match the average response duration of sub-apps and plugins. This avoids invocation interruptions.

How to set configurations

Configuration Item	Recommended Value	Rationale
`match_mode`	`Keyword + context matching based on user input`	Aligns with the core matching logic of multi-app routing to accurately locate target sub-apps
`plugin_bind_id`	`Unique identifier of the plugin bound to the route`	Ensures the correct plugin instance is associated during tool calls, invoking specified plugin functionality
`plugin_invoke_timeout`	`600 seconds`	Covers the average response duration of most plugins and sub-apps, avoiding invocation interruptions
`enable_context_transfer`	`Enabled`	Supports session context transfer, enabling reuse of contextual associations for sub-apps and plugins
`payload_validation_mode`	`Strict mode`	Validates request JSON format and field compliance, preventing errors caused by unknown fields
`max_matched_apps`	`1-3 entries`	Balances routing efficiency and matching accuracy, avoiding excessive matching results

The parameter values provided on this page are common recommendations used as starting points for configuration. Actual values are affected by material form, data volume, and business rules. Specific issues require case-by-case analysis, and it is recommended to test on your own samples before finalizing settings.

Three common mistakes

A 400 Invalid JSON payload received. Unknown name error occurs when the request carries fields not defined by the plugin, and the strict validation mode of payload_validation_mode is not enabled.
Context cannot be reused when invoking workflow APIs because the enable_context_transfer configuration is not enabled, and the context_attach field is not included in the request.
Tool calls fail after upgrading the PgVector plugin because the plugin_bind_id is not updated to the unique identifier of the new version plugin, and the configuration of the old version plugin is still bound.

How to confirm configurations are set correctly

Initiate a single-round test invocation, check that the routing match result matches the expected sub-app based on the configured match_mode.
View tool invocation logs, confirm that results are returned within the set duration of plugin_invoke_timeout, with no timeout errors.
Initiate a test invocation with a session identifier, confirm that the sub-app can reuse previous session context data.
Send a request carrying undefined fields, confirm that a 400 format error is triggered, verifying that the validation rule is active.

Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-14.