Derive MCP error context from tool names

[kennethbruskiewicz]

Summary

• remove the MCP server's per-tool error-prefix registry
• derive human-readable error context from the reflected tool function name
• keep protocol conversion focused on translating shared invocation errors
• cover existing and newly added tool names without synchronized metadata

Testing

• ============================= test session starts ==============================
  platform darwin -- Python 3.13.5, pytest-8.4.2, pluggy-1.6.0
  rootdir: /Users/kenneth/Sync/ken/active/90_work/Translator_component_toolkit
  configfile: pyproject.toml
  plugins: anyio-4.10.0, cov-6.2.1
  collected 21 items

tests/test_invocation.py ............ [ 57%]
tests/test_server.py ...... [ 85%]
tests/test_mcp_contract.py ... [100%]

================================ tests coverage ================================
_______________ coverage: platform darwin, python 3.13.5-final-0 _______________

Name Stmts Miss Cover Missing

TCT/TCT.py 893 805 10% 59, 63-68, 79-84, 103, 107-311, 335-346, 355-358, 368-383, 386-394, 398-402, 410-426, 449-496, 509-609, 622-722, 728-762, 771-798, 803-842, 857-900, 961, 989-998, 1011, 1033-1036, 1053-1055, 1072, 1103-1123, 1154-1156, 1188-1189, 1218, 1245-1286, 1291-1356, 1360-1406, 1413-1455, 1465-1512, 1523-1575, 1582-1595, 1600-1611, 1615-1620, 1624-1637, 1643-1683, 1688-1711, 1733-1763, 1768-1772, 1776-1823, 1827-1874, 1878-1925, 1929-1951, 1954-1966, 1970-2016, 2019-2037, 2081-2087, 2091-2215, 2218-2237, 2240-2258
TCT/TCT_Visualization.py 55 55 0% 2-99
TCT/TCT_neighborhood_finder.py 155 146 6% 47-126, 138-217, 276-338
TCT/TCT_network_annotator.py 100 100 0% 1-263
TCT/TCT_pathfinder.py 169 152 10% 66-115, 121-153, 161-191, 204-313, 332-363, 381-384, 403-412, 429-432, 450-459, 523-593
TCT/init.py 4 0 100%
TCT/config.py 45 21 53% 22-26, 72-77, 81-83, 97-98, 110-111, 116, 122, 127
TCT/graph_downloader.py 38 38 0% 3-64
TCT/interfaces/init.py 0 0 100%
TCT/interfaces/cli.py 115 115 0% 3-191
TCT/interfaces/invocation.py 73 15 79% 70-71, 76-78, 84-95
TCT/interfaces/mcp.py 23 1 96% 52
TCT/interfaces/tools.py 48 17 65% 40, 72, 94, 116, 131, 143, 169, 193, 203, 221, 242, 264, 287, 305-306, 330-331
TCT/kg_loader.py 237 237 0% 3-378
TCT/name_resolver.py 84 74 12% 18-20, 59-78, 96-113, 118-121, 151-180, 198-217
TCT/node_annotator.py 21 15 29% 17-19, 23, 49-64
TCT/node_normalizer.py 94 86 9% 18-20, 53-96, 116-135, 148-195
TCT/server.py 2 0 100%
TCT/translator_kpinfo.py 75 68 9% 17-19, 43-153
TCT/translator_metakg.py 193 185 4% 8-41, 65-97, 131-138, 168-331, 348-355
TCT/translator_node.py 64 18 72% 64, 69, 73, 78-94
TCT/translator_query.py 89 78 12% 26-44, 55-65, 87-132, 157-169, 176-194, 219-251
TCT/trapi.py 22 16 27% 55-79, 118-135

TOTAL 2599 2242 14%
Coverage HTML written to dir htmlcov
Coverage XML written to file coverage.xml
============================== 21 passed in 7.51s ============================== (21 passed)

• full suite: 83 passed, 1 skipped, 13 unrelated live-service failures (NodeNorm CI returned 404; node-annotation responses no longer matched two fixtures)