table_maintenance_list
List recent compaction, snapshot expiration and orphan discovery jobs on an Iceberg data endpoint, with policy drift and storage health.
When to use it
Use table_maintenance_list to list table maintenance. This tool operates at workspace scope. It does not require a project context unless a filtering argument explicitly asks for one.
Plugin requirements
Requires the Iceberg connector (@craven/iceberg). The selected data endpoint must use that connector, with its catalog and storage configured. These are platform MCP tools backed by the connector, not a separate maintenance plugin. Use the plugin setup guides for configuration. Inspect the workspace’s plugin installations and check the installation before executing it.
Arguments
| Name | Type | Required | Default | Constraints |
|---|---|---|---|---|
sourceId | string | Yes | — | Format: uuid; Pattern constraint; see full schema |
View the complete input schema, including nested contracts and alternative shapes. The schema is extracted from the workspace server’s Zod definitions. Runtime validation also enforces custom checks that JSON Schema cannot express.
Response shape
The operation-specific payload is returned in data; its contents follow the operation described above.
MCP returns a text block containing the JSON operation result and a
structuredContent copy. The envelope includes data, completeness,
truncated, freshness, and warnings. Depending on the operation it can also
include nextCursor, evidence, job, or receipt.
Check those fields before treating a conversational summary as the result.
When a job is returned, inspect its status with the appropriate execution tool;
a queued response is not confirmation that work finished. Follow evidence links
when checking the underlying records.
Input methods
This request illustrates the argument structure. Replace every angle-bracket placeholder with a real value and supply any applicable optional fields from the schema. Nested business contracts must match your actual configuration. Send it through an authenticated, initialized MCP client; this JSON alone does not establish a session or sign you in.
Use Semogram’s table_maintenance_list tool to list table maintenance. Confirm the workspace and use records I can access. Do not change anything.
Use real resource IDs returned by earlier reads; a resource name is not a UUID. Do not fill missing business inputs with invented values.
This is an MCP tools/call request, not a form to paste into Semogram. Send it through an authenticated, initialized MCP client.
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/call",
"params": {
"name": "table_maintenance_list",
"arguments": {
"sourceId": "<SOURCE_ID_UUID>"
}
}
}FAQ
What access and approvals are required?
Required permission scopes: endpoints:read.
OAuth uses current workspace membership; API keys use their assigned scopes
and grants. Discovery can exclude tools the caller cannot use.
Read-only annotation: Yes. Destructive annotation: No. Follow the operation’s declared contract and any applicable server-side approval policy.
How should I handle retries?
Do not assume repeated calls are safe merely because the client offers Retry. Inspect the result or existing request before repeating work that changes state. For 429 responses, honor Retry-After rather than retrying immediately.
Why is this tool missing or returning an error?
Confirm the workspace, resource IDs, and permission scopes. Read the returned error before changing the request. See connection, authentication and troubleshooting for sign-in, scope, resource access, and rate-limit errors.
source_write_grant_delete
Revoke one write grant on a data endpoint. The client must obtain confirmation and pass confirm=true.
table_maintenance_schedule
Schedule compaction, snapshot expiration or orphan discovery under an approved workspace-wide write policy. Snapshots pinned anywhere in the workspace stay protected.