Tool result records: Mastra
The verdict line for each probe run, with a link to the record and its captures. The cross-client matrix is on Tool result handling, verified.
29 records, version mcp-2.9.0-alpha.1+core-1.83.0-alpha.1, no registry entry yet. Overlay data/verified/mastra.json.
| Scenario | Config | Run | At | Version | Verdict |
|---|---|---|---|---|---|
| app_only | default | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | tool not offered to the model |
| meta_only | default | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | ⟨…⟩ envelope (content 1x, structuredContent 0x, _meta reached the model) |
| meta_only | legacy | stdio | 2025-11-25 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | ⟨…⟩ envelope (content 1x, structuredContent 0x, _meta reached the model) |
| meta_only | return-errors | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | ⟨…⟩ envelope (content 1x, structuredContent 0x, _meta reached the model) |
| with_meta | default | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | {…} structuredContent only (1x, as json, _meta did not reach the model) |
| with_meta | legacy | stdio | 2025-11-25 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | {…} structuredContent only (1x, as json, _meta did not reach the model) |
| with_meta | return-errors | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | {…} structuredContent only (1x, as json, _meta did not reach the model) |
| audience_user | default | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | {…} structuredContent only (1x, as json) |
| empty_object | default | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | "…" client error text, no fixture field: "Invalid result for tools/call: [\n {\n "expected": "array",\n "code": "inval" |
| large | default | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | {…} structuredContent only (1x, as json) |
| no_content_key | default | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | "…" client error text, no fixture field: "Invalid result for tools/call: [\n {\n "expected": "array",\n "code": "inval" |
| is_error | default | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | […] content only (1x, as text) |
| is_error | return-errors | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | ⟨…⟩ envelope (content 1x, structuredContent 1x) |
| with_image | default | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | {…} structuredContent only (1x, as json) |
| schema_match | default | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | […] content only (1x, as text) |
| schema_mismatch | default | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | "…" client error text, no fixture field: "Structured content does not match the tool's output schema: data must have requi" |
| mirror | default | http | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | payload once (as json) |
| mirror | default | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | payload once (as json) |
| mirror | legacy | stdio | 2025-11-25 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | payload once (as json) |
| sc_empty | default | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | "…" no marker reached the model; payload: "{}" |
| sc_null | default | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | "…" no marker reached the model; payload: "null" |
| sc_string | default | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | {…} structuredContent only (1x, as text) |
| structured_only | default | http | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | {…} structuredContent only (1x, as json) |
| structured_only | default | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | {…} structuredContent only (1x, as json) |
| structured_only | legacy | stdio | 2025-11-25 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | {…} structuredContent only (1x, as json) |
| summary_and_data | default | http | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | {…} structuredContent only (1x, as json) |
| summary_and_data | default | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | {…} structuredContent only (1x, as json) |
| summary_and_data | legacy | stdio | 2025-11-25 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | {…} structuredContent only (1x, as json) |
| summary_and_data | return-errors | stdio | 2026-07-28 |
mcp-2.9.0-alpha.1+core-1.83.0-alpha.1 | {…} structuredContent only (1x, as json) |